feat: MapLibre → deck.gl 전면 전환 + 어구 서브클러스터 구조 개선

- 실시간 선박 13K: MapLibre symbol → deck.gl IconLayer (useShipDeckLayers + shipDeckStore)
- 선단/어구 폴리곤: MapLibre Source/Layer → deck.gl GeoJsonLayer (useFleetClusterDeckLayers)
- 선박 팝업: MapLibre Popup → React 오버레이 (ShipPopupOverlay + ShipHoverTooltip)
- 리플레이 집중 모드 (focusMode), 라벨 클러스터링, fontScale 연동
- Python: group_key 고정 + sub_cluster_id 분리, 한국 국적 어구 오탐 제외
- DB: sub_cluster_id 컬럼 추가 + 기존 '#N' 데이터 마이그레이션
- Backend: DISTINCT ON CTE로 서브클러스터 중복 제거, subClusterId DTO 추가

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/worktrees/beautiful-lamarr

@@ -0,0 +1 @@
+Subproject commit ef342769d461dfe48d0e981eb534d467721a41f5

backend/src/main/java/gc/mda/kcg/domain/fleet/GroupPolygonDto.java

@@ -14,6 +14,7 @@ public class GroupPolygonDto {
     private String groupType;
     private String groupKey;
     private String groupLabel;
+    private int subClusterId;
     private String snapshotTime;
     private Object polygon;       // GeoJSON Polygon (parsed from ST_AsGeoJSON)
     private double centerLat;

backend/src/main/java/gc/mda/kcg/domain/fleet/GroupPolygonService.java

@@ -28,7 +28,7 @@ public class GroupPolygonService {
     private volatile long lastCacheTime = 0;
 
     private static final String LATEST_GROUPS_SQL = """
-            SELECT group_type, group_key, group_label, snapshot_time,
+            SELECT group_type, group_key, group_label, sub_cluster_id, snapshot_time,
                    ST_AsGeoJSON(polygon) AS polygon_geojson,
                    ST_Y(center_point) AS center_lat, ST_X(center_point) AS center_lon,
                    area_sq_nm, member_count, zone_id, zone_name, members, color
@@ -38,7 +38,7 @@ public class GroupPolygonService {
             """;
 
     private static final String GROUP_DETAIL_SQL = """
-            SELECT group_type, group_key, group_label, snapshot_time,
+            SELECT group_type, group_key, group_label, sub_cluster_id, snapshot_time,
                    ST_AsGeoJSON(polygon) AS polygon_geojson,
                    ST_Y(center_point) AS center_lat, ST_X(center_point) AS center_lon,
                    area_sq_nm, member_count, zone_id, zone_name, members, color
@@ -49,7 +49,7 @@ public class GroupPolygonService {
             """;
 
     private static final String GROUP_HISTORY_SQL = """
-            SELECT group_type, group_key, group_label, snapshot_time,
+            SELECT group_type, group_key, group_label, sub_cluster_id, snapshot_time,
                    ST_AsGeoJSON(polygon) AS polygon_geojson,
                    ST_Y(center_point) AS center_lat, ST_X(center_point) AS center_lon,
                    area_sq_nm, member_count, zone_id, zone_name, members, color
@@ -59,21 +59,27 @@ public class GroupPolygonService {
             """;
 
     private static final String GROUP_CORRELATIONS_SQL = """
-            SELECT s.target_mmsi, s.target_type, s.target_name,
-                   s.current_score, s.streak_count, s.observation_count,
-                   s.freeze_state, s.shadow_bonus_total,
-                   r.proximity_ratio, r.visit_score, r.heading_coherence,
-                   m.id AS model_id, m.name AS model_name, m.is_default
-            FROM kcg.gear_correlation_scores s
-            JOIN kcg.correlation_param_models m ON s.model_id = m.id
+            WITH best_scores AS (
+                SELECT DISTINCT ON (m.id, s.target_mmsi)
+                       s.target_mmsi, s.target_type, s.target_name,
+                       s.current_score, s.streak_count, s.observation_count,
+                       s.freeze_state, s.shadow_bonus_total,
+                       m.id AS model_id, m.name AS model_name, m.is_default
+                FROM kcg.gear_correlation_scores s
+                JOIN kcg.correlation_param_models m ON s.model_id = m.id
+                WHERE s.group_key = ? AND s.current_score >= ? AND m.is_active = TRUE
+                ORDER BY m.id, s.target_mmsi, s.current_score DESC
+            )
+            SELECT bs.*,
+                   r.proximity_ratio, r.visit_score, r.heading_coherence
+            FROM best_scores bs
             LEFT JOIN LATERAL (
                 SELECT proximity_ratio, visit_score, heading_coherence
                 FROM kcg.gear_correlation_raw_metrics
-                WHERE group_key = s.group_key AND target_mmsi = s.target_mmsi
+                WHERE group_key = ? AND target_mmsi = bs.target_mmsi
                 ORDER BY observed_at DESC LIMIT 1
             ) r ON TRUE
-            WHERE s.group_key = ? AND s.current_score >= ? AND m.is_active = TRUE
-            ORDER BY m.is_default DESC, s.current_score DESC
+            ORDER BY bs.model_id, bs.current_score DESC
             """;
 
     private static final String GEAR_STATS_SQL = """
@@ -121,7 +127,7 @@ public class GroupPolygonService {
                 row.put("modelName", rs.getString("model_name"));
                 row.put("isDefault", rs.getBoolean("is_default"));
                 return row;
-            }, groupKey, minScore);
+            }, groupKey, minScore, groupKey);
         } catch (Exception e) {
             log.warn("getGroupCorrelations failed for {}: {}", groupKey, e.getMessage());
             return List.of();
@@ -162,6 +168,7 @@ public class GroupPolygonService {
 
     /**
      * 특정 그룹의 시간별 히스토리.
+     * sub_cluster_id 포함하여 raw 반환 — 프론트에서 서브클러스터별 독립 center trail 구성.
      */
     public List<GroupPolygonDto> getGroupHistory(String groupKey, int hours) {
         return jdbcTemplate.query(GROUP_HISTORY_SQL, this::mapRow, groupKey, String.valueOf(hours));
@@ -192,6 +199,7 @@ public class GroupPolygonService {
                 .groupType(rs.getString("group_type"))
                 .groupKey(rs.getString("group_key"))
                 .groupLabel(rs.getString("group_label"))
+                .subClusterId(rs.getInt("sub_cluster_id"))
                 .snapshotTime(rs.getString("snapshot_time"))
                 .polygon(polygonObj)
                 .centerLat(rs.getDouble("center_lat"))

frontend/.gitignore

@@ -0,0 +1 @@
+.claude/worktrees/

frontend/src/components/korea/CorrelationPanel.tsx

@@ -1,5 +1,7 @@
-import { useState } from 'react';
+import { useState, useMemo, useRef, useCallback } from 'react';
+import { createPortal } from 'react-dom';
 import type { GearCorrelationItem } from '../../services/vesselAnalysis';
+import type { MemberInfo } from '../../services/vesselAnalysis';
 import type { UseGroupPolygonsResult } from '../../hooks/useGroupPolygons';
 import { FONT_MONO } from '../../styles/fonts';
 import { MODEL_ORDER, MODEL_COLORS, MODEL_DESC } from './fleetClusterConstants';
@@ -44,80 +46,126 @@ const CorrelationPanel = ({
   const [pinnedModelTip, setPinnedModelTip] = useState<string | null>(null);
   const activeModelTip = pinnedModelTip ?? hoveredModelTip;
 
-  // Compute identity data from groupPolygons
-  const allGroups = groupPolygons
-    ? [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups]
-    : [];
-  const group = allGroups.find(g => g.groupKey === selectedGearGroup);
-  const identityVessels = group?.members.filter(m => m.isParent) ?? [];
-  const identityGear = group?.members.filter(m => !m.isParent) ?? [];
+  // Card expand state
+  const [expandedCards, setExpandedCards] = useState<Set<string>>(new Set());
+
+  // Card ref map for tooltip positioning
+  const cardRefs = useRef<Map<string, HTMLDivElement>>(new Map());
+  const setCardRef = useCallback((model: string, el: HTMLDivElement | null) => {
+    if (el) cardRefs.current.set(model, el);
+    else cardRefs.current.delete(model);
+  }, []);
+  const toggleCardExpand = (model: string) => {
+    setExpandedCards(prev => {
+      const next = new Set(prev);
+      if (next.has(model)) next.delete(model); else next.add(model);
+      return next;
+    });
+  };
+
+  // Identity 목록: 리플레이 활성 시 전체 구간 멤버, 아닐 때 현재 스냅샷 멤버
+  const allHistoryMembers = useGearReplayStore(s => s.allHistoryMembers);
+  const { identityVessels, identityGear } = useMemo(() => {
+    if (historyActive && allHistoryMembers.length > 0) {
+      return {
+        identityVessels: allHistoryMembers.filter(m => m.isParent),
+        identityGear: allHistoryMembers.filter(m => !m.isParent),
+      };
+    }
+    if (!groupPolygons || !selectedGearGroup) return { identityVessels: [] as MemberInfo[], identityGear: [] as MemberInfo[] };
+    const allGear = [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups];
+    const matches = allGear.filter(g => g.groupKey === selectedGearGroup);
+    const seen = new Set<string>();
+    const members: MemberInfo[] = [];
+    for (const g of matches) for (const m of g.members) { if (!seen.has(m.mmsi)) { seen.add(m.mmsi); members.push(m); } }
+    return {
+      identityVessels: members.filter(m => m.isParent),
+      identityGear: members.filter(m => !m.isParent),
+    };
+  }, [historyActive, allHistoryMembers, groupPolygons, selectedGearGroup]);
 
   // Suppress unused MODEL_ORDER warning — used for ordering checks
   void _MODEL_ORDER;
 
   // Common card styles
+  const CARD_WIDTH = 180;
   const cardStyle: React.CSSProperties = {
     background: 'rgba(12,24,37,0.95)',
     borderRadius: 6,
-    minWidth: 160,
-    maxWidth: 200,
+    width: CARD_WIDTH,
+    minWidth: CARD_WIDTH,
     flexShrink: 0,
     border: '1px solid rgba(255,255,255,0.08)',
     position: 'relative',
   };
 
-  const cardScrollStyle: React.CSSProperties = {
-    padding: '6px 8px',
-    maxHeight: 200,
-    overflowY: 'auto',
+  const CARD_COLLAPSED_H = 200;
+  const CARD_EXPANDED_H = 500;
+
+  const cardFooterStyle: React.CSSProperties = {
+    display: 'flex', alignItems: 'center', gap: 4,
+    padding: '4px 8px 6px',
+    cursor: 'pointer', userSelect: 'none',
+    borderTop: '1px solid rgba(255,255,255,0.06)',
   };
 
-  // Model title tooltip hover/click handlers
+  const getCardBodyStyle = (model: string): React.CSSProperties => ({
+    padding: '6px 8px 4px',
+    maxHeight: expandedCards.has(model) ? CARD_EXPANDED_H : CARD_COLLAPSED_H,
+    overflowY: 'auto',
+    transition: 'max-height 0.2s ease',
+  });
+
+  // Model title tooltip: hover → show, right-click → pin
   const handleTipHover = (model: string) => {
     if (!pinnedModelTip) setHoveredModelTip(model);
   };
   const handleTipLeave = () => {
     if (!pinnedModelTip) setHoveredModelTip(null);
   };
-  const handleTipClick = (model: string) => {
+  const handleTipContextMenu = (e: React.MouseEvent, model: string) => {
+    e.preventDefault();
     setPinnedModelTip(prev => prev === model ? null : model);
     setHoveredModelTip(null);
   };
 
-  const renderModelTip = (model: string, color: string) => {
-    if (activeModelTip !== model) return null;
-    const desc = MODEL_DESC[model];
+  // 툴팁은 카드 밖에서 fixed로 렌더 (overflow 영향 안 받음)
+  const renderFloatingTip = () => {
+    if (!activeModelTip) return null;
+    const desc = MODEL_DESC[activeModelTip];
     if (!desc) return null;
+    const el = cardRefs.current.get(activeModelTip);
+    if (!el) return null;
+    const rect = el.getBoundingClientRect();
+    const color = MODEL_COLORS[activeModelTip] ?? '#94a3b8';
     return (
       <div style={{
-        position: 'absolute',
-        bottom: '100%',
-        left: 0,
-        marginBottom: 4,
+        position: 'fixed',
+        left: rect.left,
+        top: rect.top - 4,
+        transform: 'translateY(-100%)',
         padding: '6px 10px',
         background: 'rgba(15,23,42,0.97)',
         border: `1px solid ${color}66`,
         borderRadius: 5,
         fontSize: 9,
         color: '#e2e8f0',
-        zIndex: 30,
+        zIndex: 50,
         whiteSpace: 'nowrap',
         boxShadow: '0 2px 12px rgba(0,0,0,0.6)',
-        pointerEvents: pinnedModelTip === model ? 'auto' : 'none',
+        pointerEvents: pinnedModelTip ? 'auto' : 'none',
+        fontFamily: FONT_MONO,
       }}>
         <div style={{ fontWeight: 700, color, marginBottom: 4 }}>{desc.summary}</div>
         {desc.details.map((line, i) => (
           <div key={i} style={{ color: '#94a3b8', lineHeight: 1.5 }}>{line}</div>
         ))}
-        {pinnedModelTip === model && (
+        {pinnedModelTip && (
           <div style={{
-            color: '#64748b',
-            fontSize: 8,
-            marginTop: 4,
-            borderTop: '1px solid rgba(255,255,255,0.06)',
-            paddingTop: 3,
+            color: '#64748b', fontSize: 8, marginTop: 4,
+            borderTop: '1px solid rgba(255,255,255,0.06)', paddingTop: 3,
           }}>
-            클릭하여 닫기
+            우클릭하여 닫기
           </div>
         )}
       </div>
@@ -142,7 +190,7 @@ const CorrelationPanel = ({
     const isHovered = hoveredTarget?.mmsi === c.targetMmsi && hoveredTarget?.model === modelName;
     return (
       <div
-        key={c.targetMmsi}
+        key={`${modelName}-${c.targetMmsi}`}
         style={{
           fontSize: 9, marginBottom: 1, display: 'flex', alignItems: 'center', gap: 3,
           padding: '1px 2px', borderRadius: 2, cursor: 'pointer',
@@ -172,11 +220,11 @@ const CorrelationPanel = ({
   };
 
   // Member row renderer (identity model — no score, independent hover)
-  const renderMemberRow = (m: { mmsi: string; name: string }, icon: string, iconColor: string) => {
+  const renderMemberRow = (m: { mmsi: string; name: string }, icon: string, iconColor: string, keyPrefix = 'id') => {
     const isHovered = hoveredTarget?.mmsi === m.mmsi && hoveredTarget?.model === 'identity';
     return (
       <div
-        key={m.mmsi}
+        key={`${keyPrefix}-${m.mmsi}`}
         style={{
           fontSize: 9,
           marginBottom: 1,
@@ -203,27 +251,25 @@ const CorrelationPanel = ({
     <div style={{
       position: 'absolute',
       bottom: historyActive ? 120 : 20,
-      left: 'calc(50% - 210px)',
+      left: 'calc(50% + 100px)',
+      transform: 'translateX(-50%)',
+      width: 'calc(100vw - 880px)',
+      maxWidth: 1320,
       display: 'flex',
       gap: 6,
-      alignItems: 'flex-start',
+      alignItems: 'flex-end',
       zIndex: 21,
       fontFamily: FONT_MONO,
       fontSize: 10,
       color: '#e2e8f0',
       pointerEvents: 'auto',
-      maxWidth: 'calc(100vw - 40px)',
-      overflowX: 'auto',
-      overflowY: 'visible',
     }}>
-      {/* 고정: 토글 패널 */}
+      {/* 고정: 토글 패널 (스크롤 밖) */}
       <div style={{
         background: 'rgba(12,24,37,0.95)',
         border: '1px solid rgba(249,115,22,0.3)',
         borderRadius: 8,
         padding: '8px 10px',
-        position: 'sticky',
-        left: 0,
         minWidth: 165,
         flexShrink: 0,
         boxShadow: '0 4px 16px rgba(0,0,0,0.5)',
@@ -268,20 +314,16 @@ const CorrelationPanel = ({
         })}
       </div>
 
+      {/* 스크롤 영역: 모델 카드들 */}
+      <div style={{
+        display: 'flex', gap: 6, alignItems: 'flex-end',
+        overflowX: 'auto', overflowY: 'visible', flex: 1, minWidth: 0,
+      }}>
+
       {/* 이름 기반 카드 (체크 시) */}
       {enabledModels.has('identity') && (identityVessels.length > 0 || identityGear.length > 0) && (
-        <div style={{ ...cardStyle, borderColor: 'rgba(249,115,22,0.25)' }}>
-          {renderModelTip('identity', '#f97316')}
-          <div style={cardScrollStyle}>
-            <div
-              style={{ display: 'flex', alignItems: 'center', gap: 4, marginBottom: 4, cursor: 'help' }}
-              onMouseEnter={() => handleTipHover('identity')}
-              onMouseLeave={handleTipLeave}
-              onClick={() => handleTipClick('identity')}
-            >
-              <span style={{ width: 8, height: 8, borderRadius: '50%', background: '#f97316', flexShrink: 0 }} />
-              <span style={{ fontSize: 9, fontWeight: 700, color: '#f97316' }}>이름 기반</span>
-            </div>
+        <div ref={(el) => setCardRef('identity', el)} style={{ ...cardStyle, borderColor: 'rgba(249,115,22,0.25)', position: 'relative' }}>
+                    <div style={getCardBodyStyle('identity')}>
             {identityVessels.length > 0 && (
               <>
                 <div style={{ fontSize: 8, color: '#64748b', marginBottom: 2 }}>연관 선박 ({identityVessels.length})</div>
@@ -291,13 +333,21 @@ const CorrelationPanel = ({
             {identityGear.length > 0 && (
               <>
                 <div style={{ fontSize: 8, color: '#64748b', marginBottom: 2, marginTop: 3 }}>연관 어구 ({identityGear.length})</div>
-                {identityGear.slice(0, 12).map(m => renderMemberRow(m, '◆', '#f97316'))}
-                {identityGear.length > 12 && (
-                  <div style={{ fontSize: 8, color: '#4a6b82' }}>+{identityGear.length - 12}개 더</div>
-                )}
+                {identityGear.map(m => renderMemberRow(m, '◆', '#f97316'))}
               </>
             )}
           </div>
+          <div
+            style={cardFooterStyle}
+            onClick={() => toggleCardExpand('identity')}
+            onMouseEnter={() => handleTipHover('identity')}
+            onMouseLeave={handleTipLeave}
+            onContextMenu={(e) => handleTipContextMenu(e, 'identity')}
+          >
+            <span style={{ width: 8, height: 8, borderRadius: '50%', background: '#f97316', flexShrink: 0 }} />
+            <span style={{ fontSize: 9, fontWeight: 700, color: '#f97316', flex: 1 }}>이름 기반</span>
+            <span style={{ fontSize: 8, color: '#64748b' }}>{expandedCards.has('identity') ? '▾' : '▴'}</span>
+          </div>
         </div>
       )}
 
@@ -309,40 +359,37 @@ const CorrelationPanel = ({
         const gears = items.filter(c => c.targetType !== 'VESSEL');
         if (vessels.length === 0 && gears.length === 0) return null;
         return (
-          <div key={m.name} style={{ ...cardStyle, borderColor: `${color}40` }}>
-            {renderModelTip(m.name, color)}
-            <div style={cardScrollStyle}>
-              <div
-                style={{ display: 'flex', alignItems: 'center', gap: 4, marginBottom: 4, cursor: 'help' }}
-                onMouseEnter={() => handleTipHover(m.name)}
-                onMouseLeave={handleTipLeave}
-                onClick={() => handleTipClick(m.name)}
-              >
-                <span style={{ width: 8, height: 8, borderRadius: '50%', background: color, flexShrink: 0 }} />
-                <span style={{ fontSize: 9, fontWeight: 700, color }}>{m.name}{m.isDefault ? '*' : ''}</span>
-              </div>
+          <div key={m.name} ref={(el) => setCardRef(m.name, el)} style={{ ...cardStyle, borderColor: `${color}40`, position: 'relative' }}>
+                        <div style={getCardBodyStyle(m.name)}>
               {vessels.length > 0 && (
                 <>
                   <div style={{ fontSize: 8, color: '#64748b', marginBottom: 2 }}>연관 선박 ({vessels.length})</div>
-                  {vessels.slice(0, 10).map(c => renderRow(c, color, m.name))}
-                  {vessels.length > 10 && (
-                    <div style={{ fontSize: 8, color: '#4a6b82' }}>+{vessels.length - 10}건 더</div>
-                  )}
+                  {vessels.map(c => renderRow(c, color, m.name))}
                 </>
               )}
               {gears.length > 0 && (
                 <>
                   <div style={{ fontSize: 8, color: '#64748b', marginBottom: 2, marginTop: 3 }}>연관 어구 ({gears.length})</div>
-                  {gears.slice(0, 10).map(c => renderRow(c, color, m.name))}
-                  {gears.length > 10 && (
-                    <div style={{ fontSize: 8, color: '#4a6b82' }}>+{gears.length - 10}건 더</div>
-                  )}
+                  {gears.map(c => renderRow(c, color, m.name))}
                 </>
               )}
             </div>
+            <div
+              style={cardFooterStyle}
+              onClick={() => toggleCardExpand(m.name)}
+              onMouseEnter={() => handleTipHover(m.name)}
+              onMouseLeave={handleTipLeave}
+              onContextMenu={(e) => handleTipContextMenu(e, m.name)}
+            >
+              <span style={{ width: 8, height: 8, borderRadius: '50%', background: color, flexShrink: 0 }} />
+              <span style={{ fontSize: 9, fontWeight: 700, color, flex: 1 }}>{m.name}{m.isDefault ? '*' : ''}</span>
+              <span style={{ fontSize: 8, color: '#64748b' }}>{expandedCards.has(m.name) ? '▾' : '▴'}</span>
+            </div>
           </div>
         );
       })}
+      </div>{/* 스크롤 영역 끝 */}
+      {renderFloatingTip() && createPortal(renderFloatingTip(), document.body)}
     </div>
   );
 };

frontend/src/components/korea/FleetClusterLayer.tsx

@@ -1,11 +1,82 @@
-import { useState, useEffect, useMemo, useCallback, useRef } from 'react';
-import { useMap } from 'react-map-gl/maplibre';
-import type { MapLayerMouseEvent } from 'maplibre-gl';
+import { useState, useEffect, useMemo, useCallback } from 'react';
+import type { Layer as DeckLayer } from '@deck.gl/core';
 import type { Ship, VesselAnalysisDto } from '../../types';
 import { fetchFleetCompanies, fetchGroupHistory, fetchGroupCorrelations, fetchCorrelationTracks } from '../../services/vesselAnalysis';
 import type { FleetCompany, GearCorrelationItem, CorrelationVesselTrack } from '../../services/vesselAnalysis';
 import type { UseGroupPolygonsResult } from '../../hooks/useGroupPolygons';
 import { useGearReplayStore } from '../../stores/gearReplayStore';
+import { useFleetClusterDeckLayers } from '../../hooks/useFleetClusterDeckLayers';
+import { useShipDeckStore } from '../../stores/shipDeckStore';
+import type { PickedPolygonFeature } from '../../hooks/useFleetClusterDeckLayers';
+import { useFontScale } from '../../hooks/useFontScale';
+import type { GroupPolygonDto } from '../../services/vesselAnalysis';
+
+/** 서브클러스터 center 시계열 (독립 추적용) */
+export interface SubClusterCenter {
+  subClusterId: number;
+  path: [number, number][]; // [lon, lat] 시간순
+  timestamps: number[];     // epoch ms
+}
+
+/**
+ * 히스토리를 서브클러스터별로 분리하여:
+ * 1. frames: 시간별 멤버 합산 프레임 (리플레이 애니메이션용)
+ * 2. subClusterCenters: 서브클러스터별 독립 center 궤적 (PathLayer용)
+ */
+function splitAndMergeHistory(history: GroupPolygonDto[]) {
+  // 시간순 정렬 (오래된 것 먼저)
+  const sorted = [...history].sort((a, b) =>
+    new Date(a.snapshotTime).getTime() - new Date(b.snapshotTime).getTime(),
+  );
+
+  // 1. 서브클러스터별 center 궤적 수집
+  const centerMap = new Map<number, { path: [number, number][]; timestamps: number[] }>();
+  for (const h of sorted) {
+    const sid = h.subClusterId ?? 0;
+    const entry = centerMap.get(sid) ?? { path: [], timestamps: [] };
+    entry.path.push([h.centerLon, h.centerLat]);
+    entry.timestamps.push(new Date(h.snapshotTime).getTime());
+    centerMap.set(sid, entry);
+  }
+  const subClusterCenters: SubClusterCenter[] = [...centerMap.entries()].map(
+    ([subClusterId, data]) => ({ subClusterId, ...data }),
+  );
+
+  // 2. 시간별 멤버 합산 프레임 (기존 리플레이 호환)
+  const byTime = new Map<string, GroupPolygonDto[]>();
+  for (const h of sorted) {
+    const list = byTime.get(h.snapshotTime) ?? [];
+    list.push(h);
+    byTime.set(h.snapshotTime, list);
+  }
+
+  const frames: GroupPolygonDto[] = [];
+  for (const [, items] of byTime) {
+    if (items.length === 1) {
+      frames.push(items[0]);
+      continue;
+    }
+    const seen = new Set<string>();
+    const allMembers: GroupPolygonDto['members'] = [];
+    for (const item of items) {
+      for (const m of item.members) {
+        if (!seen.has(m.mmsi)) { seen.add(m.mmsi); allMembers.push(m); }
+      }
+    }
+    const biggest = items.reduce((a, b) => (a.memberCount >= b.memberCount ? a : b));
+    frames.push({
+      ...biggest,
+      subClusterId: 0,
+      members: allMembers,
+      memberCount: allMembers.length,
+      // 가장 큰 서브클러스터의 center 사용 (가중 평균 아닌 대표 center)
+      centerLat: biggest.centerLat,
+      centerLon: biggest.centerLon,
+    });
+  }
+
+  return { frames: fillGapFrames(frames), subClusterCenters };
+}
 
 // ── 분리된 모듈 ──
 import type { PickerCandidate, HoverTooltipState, GearPickerPopupState } from './fleetClusterTypes';
@@ -29,10 +100,13 @@ interface Props {
   onSelectedGearChange?: (data: import('./fleetClusterTypes').SelectedGearGroupData | null) => void;
   onSelectedFleetChange?: (data: import('./fleetClusterTypes').SelectedFleetData | null) => void;
   groupPolygons?: UseGroupPolygonsResult;
+  zoomScale?: number;
+  onDeckLayersChange?: (layers: DeckLayer[]) => void;
 }
 
-export function FleetClusterLayer({ ships, analysisMap: analysisMapProp, onShipSelect, onFleetZoom, onSelectedGearChange, onSelectedFleetChange, groupPolygons }: Props) {
+export function FleetClusterLayer({ ships, analysisMap: analysisMapProp, onShipSelect, onFleetZoom, onSelectedGearChange, onSelectedFleetChange, groupPolygons, zoomScale = 1, onDeckLayersChange }: Props) {
   const analysisMap = analysisMapProp ?? EMPTY_ANALYSIS;
+  const { fontScale } = useFontScale();
 
   // ── 선단/어구 패널 상태 ──
   const [companies, setCompanies] = useState<Map<number, FleetCompany>>(new Map());
@@ -40,6 +114,7 @@ export function FleetClusterLayer({ ships, analysisMap: analysisMapProp, onShipS
   const [activeSection, setActiveSection] = useState<string | null>('fleet');
   const toggleSection = (key: string) => setActiveSection(prev => prev === key ? null : key);
   const [hoveredFleetId, setHoveredFleetId] = useState<number | null>(null);
+  const [hoveredGearName, setHoveredGearName] = useState<string | null>(null);
   const [expandedGearGroup, setExpandedGearGroup] = useState<string | null>(null);
   const [selectedGearGroup, setSelectedGearGroup] = useState<string | null>(null);
 
@@ -60,9 +135,6 @@ export function FleetClusterLayer({ ships, analysisMap: analysisMapProp, onShipS
   const historyActive = useGearReplayStore(s => s.historyFrames.length > 0);
 
   // ── 맵 + ref ──
-  const { current: mapRef } = useMap();
-  const registeredRef = useRef(false);
-  const dataRef = useRef<{ shipMap: Map<string, Ship>; groupPolygons: UseGroupPolygonsResult | undefined; onFleetZoom: Props['onFleetZoom'] }>({ shipMap: new Map(), groupPolygons, onFleetZoom });
 
   // ── 초기 로드 ──
   useEffect(() => {
@@ -78,9 +150,8 @@ export function FleetClusterLayer({ ships, analysisMap: analysisMapProp, onShipS
       fetchCorrelationTracks(groupKey, 24, 0.3).catch(() => ({ vessels: [] as CorrelationVesselTrack[] })),
     ]);
 
-    // 2. 데이터 전처리
-    const sorted = history.reverse();
-    const filled = fillGapFrames(sorted);
+    // 2. 서브클러스터별 분리 → 멤버 합산 프레임 + 서브클러스터별 독립 center
+    const { frames: filled, subClusterCenters } = splitAndMergeHistory(history);
     const corrData = corrRes.items;
     const corrTracks = trackRes.vessels;
 
@@ -105,12 +176,36 @@ export function FleetClusterLayer({ ships, analysisMap: analysisMapProp, onShipS
     // 4. 스토어 초기화 (모든 데이터 포함) → 재생 시작
     const store = useGearReplayStore.getState();
     store.loadHistory(filled, corrTracks, corrData, enabledModels, vessels);
+    // 서브클러스터별 독립 center 궤적 + 전체 구간 고유 멤버 저장
+    const seen = new Set<string>();
+    const allHistoryMembers: { mmsi: string; name: string; isParent: boolean }[] = [];
+    for (const f of history) {
+      for (const m of f.members) {
+        if (!seen.has(m.mmsi)) {
+          seen.add(m.mmsi);
+          allHistoryMembers.push({ mmsi: m.mmsi, name: m.name, isParent: m.isParent });
+        }
+      }
+    }
+    useGearReplayStore.setState({ subClusterCenters, allHistoryMembers });
     store.play();
   };
 
   const closeHistory = useCallback(() => {
     useGearReplayStore.getState().reset();
     setSelectedGearGroup(null);
+    setCorrelationData([]);
+    setCorrelationTracks([]);
+    setEnabledVessels(new Set());
+  }, []);
+
+  // ── cnFishing 탭 off (unmount) 시 재생 상태 + deck layers 전체 초기화 ──
+  useEffect(() => {
+    return () => {
+      useGearReplayStore.getState().reset();
+      onDeckLayersChange?.([]);
+    };
+  // eslint-disable-next-line react-hooks/exhaustive-deps
   }, []);
 
   // ── enabledModels/enabledVessels/hoveredTarget → store 동기화 ──
@@ -140,141 +235,7 @@ export function FleetClusterLayer({ ships, analysisMap: analysisMapProp, onShipS
     return () => window.removeEventListener('keydown', onKeyDown);
   }, [historyActive, closeHistory]);
 
-  // ── 맵 이벤트 등록 ──
-  useEffect(() => {
-    const map = mapRef?.getMap();
-    if (!map || registeredRef.current) return;
-
-    const fleetLayers = ['fleet-cluster-fill-layer'];
-    const gearLayers = ['gear-cluster-fill-layer'];
-    const allLayers = [...fleetLayers, ...gearLayers];
-    const setCursor = (cursor: string) => { map.getCanvas().style.cursor = cursor; };
-
-    const onFleetEnter = (e: MapLayerMouseEvent) => {
-      setCursor('pointer');
-      const feat = e.features?.[0];
-      if (!feat) return;
-      const cid = feat.properties?.clusterId as number | undefined;
-      if (cid != null) {
-        setHoveredFleetId(cid);
-        setHoverTooltip({ lng: e.lngLat.lng, lat: e.lngLat.lat, type: 'fleet', id: cid });
-      }
-    };
-    const onFleetLeave = () => {
-      setCursor('');
-      setHoveredFleetId(null);
-      setHoverTooltip(prev => prev?.type === 'fleet' ? null : prev);
-    };
-
-    const handleFleetSelect = (cid: number) => {
-      const d = dataRef.current;
-      setExpandedFleet(prev => prev === cid ? null : cid);
-      setActiveSection('fleet');
-      const group = d.groupPolygons?.fleetGroups.find(g => Number(g.groupKey) === cid);
-      if (!group || group.members.length === 0) return;
-      let minLat = Infinity, maxLat = -Infinity, minLng = Infinity, maxLng = -Infinity;
-      for (const m of group.members) {
-        if (m.lat < minLat) minLat = m.lat;
-        if (m.lat > maxLat) maxLat = m.lat;
-        if (m.lon < minLng) minLng = m.lon;
-        if (m.lon > maxLng) maxLng = m.lon;
-      }
-      if (minLat !== Infinity) d.onFleetZoom?.({ minLat, maxLat, minLng, maxLng });
-      loadHistory(String(cid));
-    };
-
-    const handleGearGroupZoomFromMap = (name: string) => {
-      const d = dataRef.current;
-      setSelectedGearGroup(prev => prev === name ? null : name);
-      setExpandedGearGroup(name);
-      const isInZone = d.groupPolygons?.gearInZoneGroups.some(g => g.groupKey === name);
-      setActiveSection(isInZone ? 'inZone' : 'outZone');
-      requestAnimationFrame(() => {
-        setTimeout(() => {
-          document.getElementById(`gear-row-${name}`)?.scrollIntoView({ behavior: 'smooth', block: 'start' });
-        }, 50);
-      });
-      const allGroups = d.groupPolygons ? [...d.groupPolygons.gearInZoneGroups, ...d.groupPolygons.gearOutZoneGroups] : [];
-      const group = allGroups.find(g => g.groupKey === name);
-      if (!group || group.members.length === 0) return;
-      let minLat = Infinity, maxLat = -Infinity, minLng = Infinity, maxLng = -Infinity;
-      for (const m of group.members) {
-        if (m.lat < minLat) minLat = m.lat;
-        if (m.lat > maxLat) maxLat = m.lat;
-        if (m.lon < minLng) minLng = m.lon;
-        if (m.lon > maxLng) maxLng = m.lon;
-      }
-      if (minLat !== Infinity) d.onFleetZoom?.({ minLat, maxLat, minLng, maxLng });
-      loadHistory(name);
-    };
-
-    const onPolygonClick = (e: MapLayerMouseEvent) => {
-      const features = map.queryRenderedFeatures(e.point, { layers: allLayers });
-      if (features.length === 0) return;
-      const seen = new Set<string>();
-      const candidates: PickerCandidate[] = [];
-      for (const f of features) {
-        const cid = f.properties?.clusterId as number | undefined;
-        const gearName = f.properties?.name as string | undefined;
-        if (cid != null) {
-          const key = `fleet-${cid}`;
-          if (seen.has(key)) continue;
-          seen.add(key);
-          const d = dataRef.current;
-          const g = d.groupPolygons?.fleetGroups.find(x => Number(x.groupKey) === cid);
-          candidates.push({ name: g?.groupLabel ?? `선단 #${cid}`, count: g?.memberCount ?? 0, inZone: false, isFleet: true, clusterId: cid });
-        } else if (gearName) {
-          if (seen.has(gearName)) continue;
-          seen.add(gearName);
-          candidates.push({ name: gearName, count: f.properties?.gearCount ?? 0, inZone: f.properties?.inZone === 1, isFleet: false });
-        }
-      }
-      if (candidates.length === 1) {
-        const c = candidates[0];
-        if (c.isFleet && c.clusterId != null) handleFleetSelect(c.clusterId);
-        else handleGearGroupZoomFromMap(c.name);
-      } else if (candidates.length > 1) {
-        setGearPickerPopup({ lng: e.lngLat.lng, lat: e.lngLat.lat, candidates });
-      }
-    };
-
-    const onGearEnter = (e: MapLayerMouseEvent) => {
-      setCursor('pointer');
-      const feat = e.features?.[0];
-      if (!feat) return;
-      const name = feat.properties?.name as string | undefined;
-      if (name) setHoverTooltip({ lng: e.lngLat.lng, lat: e.lngLat.lat, type: 'gear', id: name });
-    };
-    const onGearLeave = () => {
-      setCursor('');
-      setHoverTooltip(prev => prev?.type === 'gear' ? null : prev);
-    };
-
-    const register = () => {
-      const ready = allLayers.every(id => map.getLayer(id));
-      if (!ready) return;
-      registeredRef.current = true;
-      for (const id of fleetLayers) {
-        map.on('mouseenter', id, onFleetEnter);
-        map.on('mouseleave', id, onFleetLeave);
-        map.on('click', id, onPolygonClick);
-      }
-      for (const id of gearLayers) {
-        map.on('mouseenter', id, onGearEnter);
-        map.on('mouseleave', id, onGearLeave);
-        map.on('click', id, onPolygonClick);
-      }
-    };
-
-    register();
-    if (!registeredRef.current) {
-      const interval = setInterval(() => {
-        register();
-        if (registeredRef.current) clearInterval(interval);
-      }, 500);
-      return () => clearInterval(interval);
-    }
-  }, [mapRef]);
+  // 맵 이벤트 → deck.gl 콜백으로 전환 완료 (handleDeckPolygonClick/Hover)
 
   // ── ships map ──
   const shipMap = useMemo(() => {
@@ -283,7 +244,7 @@ export function FleetClusterLayer({ ships, analysisMap: analysisMapProp, onShipS
     return m;
   }, [ships]);
 
-  dataRef.current = { shipMap, groupPolygons, onFleetZoom };
+
 
   // ── 부모 콜백 동기화: 어구 그룹 선택 ──
   useEffect(() => {
@@ -293,11 +254,15 @@ export function FleetClusterLayer({ ships, analysisMap: analysisMapProp, onShipS
       return;
     }
     const allGroups = groupPolygons ? [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups] : [];
-    const group = allGroups.find(g => g.groupKey === selectedGearGroup);
-    if (!group) { onSelectedGearChange?.(null); return; }
-    const parent = group.members.find(m => m.isParent);
-    const gears = group.members.filter(m => !m.isParent);
-    const toShip = (m: typeof group.members[0]): Ship => ({
+    const matches = allGroups.filter(g => g.groupKey === selectedGearGroup);
+    if (matches.length === 0) { onSelectedGearChange?.(null); return; }
+    // 서브클러스터 멤버 합산
+    const seen = new Set<string>();
+    const allMembers: typeof matches[0]['members'] = [];
+    for (const g of matches) for (const m of g.members) { if (!seen.has(m.mmsi)) { seen.add(m.mmsi); allMembers.push(m); } }
+    const parent = allMembers.find(m => m.isParent);
+    const gears = allMembers.filter(m => !m.isParent);
+    const toShip = (m: typeof allMembers[0]): Ship => ({
       mmsi: m.mmsi, name: m.name, lat: m.lat, lng: m.lon,
       heading: m.cog, speed: m.sog, course: m.cog,
       category: 'fishing', lastSeen: Date.now(),
@@ -360,6 +325,97 @@ export function FleetClusterLayer({ ships, analysisMap: analysisMapProp, onShipS
     enabledModels, enabledVessels, hoveredMmsi,
   });
 
+  // ── deck.gl 이벤트 콜백 ──
+  const handleDeckPolygonClick = useCallback((features: PickedPolygonFeature[], coordinate: [number, number]) => {
+    if (features.length === 0) return;
+    if (features.length === 1) {
+      const c = features[0];
+      if (c.type === 'fleet' && c.clusterId != null) {
+        setExpandedFleet(prev => prev === c.clusterId ? null : c.clusterId!);
+        setActiveSection('fleet');
+        const group = groupPolygons?.fleetGroups.find(g => Number(g.groupKey) === c.clusterId);
+        if (group && group.members.length > 0) {
+          let minLat = Infinity, maxLat = -Infinity, minLng = Infinity, maxLng = -Infinity;
+          for (const m of group.members) {
+            if (m.lat < minLat) minLat = m.lat;
+            if (m.lat > maxLat) maxLat = m.lat;
+            if (m.lon < minLng) minLng = m.lon;
+            if (m.lon > maxLng) maxLng = m.lon;
+          }
+          if (minLat !== Infinity) onFleetZoom?.({ minLat, maxLat, minLng, maxLng });
+        }
+        loadHistory(String(c.clusterId));
+      } else if (c.type === 'gear' && c.name) {
+        setSelectedGearGroup(prev => prev === c.name ? null : c.name!);
+        setExpandedGearGroup(c.name);
+        const isInZone = groupPolygons?.gearInZoneGroups.some(g => g.groupKey === c.name);
+        setActiveSection(isInZone ? 'inZone' : 'outZone');
+        const allGroups = groupPolygons ? [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups] : [];
+        const group = allGroups.find(g => g.groupKey === c.name);
+        if (group && group.members.length > 0) {
+          let minLat = Infinity, maxLat = -Infinity, minLng = Infinity, maxLng = -Infinity;
+          for (const m of group.members) {
+            if (m.lat < minLat) minLat = m.lat;
+            if (m.lat > maxLat) maxLat = m.lat;
+            if (m.lon < minLng) minLng = m.lon;
+            if (m.lon > maxLng) maxLng = m.lon;
+          }
+          if (minLat !== Infinity) onFleetZoom?.({ minLat, maxLat, minLng, maxLng });
+        }
+        loadHistory(c.name);
+      }
+    } else {
+      // 겹친 폴리곤 → 피커 팝업
+      const candidates: PickerCandidate[] = features.map(f => {
+        if (f.type === 'fleet') {
+          const g = groupPolygons?.fleetGroups.find(x => Number(x.groupKey) === f.clusterId);
+          return { name: g?.groupLabel ?? `선단 #${f.clusterId}`, count: g?.memberCount ?? 0, inZone: false, isFleet: true, clusterId: f.clusterId };
+        }
+        return { name: f.name ?? '', count: f.gearCount ?? 0, inZone: !!f.inZone, isFleet: false };
+      });
+      setGearPickerPopup({ lng: coordinate[0], lat: coordinate[1], candidates });
+    }
+  }, [groupPolygons, onFleetZoom, loadHistory]);
+
+  const handleDeckPolygonHover = useCallback((info: { lng: number; lat: number; type: 'fleet' | 'gear'; id: string | number } | null) => {
+    if (info) {
+      if (info.type === 'fleet') {
+        setHoveredFleetId(info.id as number);
+        setHoveredGearName(null);
+      } else {
+        setHoveredFleetId(null);
+        setHoveredGearName(info.id as string);
+      }
+      setHoverTooltip({ lng: info.lng, lat: info.lat, type: info.type, id: info.id });
+    } else {
+      setHoveredFleetId(null);
+      setHoveredGearName(null);
+      setHoverTooltip(null);
+    }
+  }, []);
+
+  // ── deck.gl 레이어 빌드 ──
+  const focusMode = useGearReplayStore(s => s.focusMode);
+  const zoomLevel = useShipDeckStore(s => s.zoomLevel);
+  const fleetDeckLayers = useFleetClusterDeckLayers(geo, {
+    selectedGearGroup,
+    hoveredMmsi,
+    hoveredGearGroup: hoveredGearName,
+    enabledModels,
+    historyActive,
+    hasCorrelationTracks: correlationTracks.length > 0,
+    zoomScale,
+    zoomLevel,
+    fontScale: fontScale.analysis,
+    focusMode,
+    onPolygonClick: handleDeckPolygonClick,
+    onPolygonHover: handleDeckPolygonHover,
+  });
+
+  useEffect(() => {
+    onDeckLayersChange?.(fleetDeckLayers);
+  }, [fleetDeckLayers, onDeckLayersChange]);
+
   // ── 어구 그룹 데이터 ──
   const inZoneGearGroups = groupPolygons?.gearInZoneGroups ?? [];
   const outZoneGearGroups = groupPolygons?.gearOutZoneGroups ?? [];
@@ -421,26 +477,21 @@ export function FleetClusterLayer({ ships, analysisMap: analysisMapProp, onShipS
   const selectedGroupMemberCount = useMemo(() => {
     if (!selectedGearGroup || !groupPolygons) return 0;
     const allGroups = [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups];
-    return allGroups.find(g => g.groupKey === selectedGearGroup)?.memberCount ?? 0;
+    return allGroups.filter(g => g.groupKey === selectedGearGroup).reduce((sum, g) => sum + g.memberCount, 0);
   }, [selectedGearGroup, groupPolygons]);
 
   return (
     <>
       {/* ── 맵 레이어 ── */}
       <FleetClusterMapLayers
-        geo={geo}
         selectedGearGroup={selectedGearGroup}
-        hoveredMmsi={hoveredMmsi}
-        enabledModels={enabledModels}
         expandedFleet={expandedFleet}
-        historyActive={historyActive}
         hoverTooltip={hoverTooltip}
         gearPickerPopup={gearPickerPopup}
         pickerHoveredGroup={pickerHoveredGroup}
         groupPolygons={groupPolygons}
         companies={companies}
         analysisMap={analysisMap}
-        hasCorrelationTracks={correlationTracks.length > 0}
         onPickerHover={setPickerHoveredGroup}
         onPickerSelect={handlePickerSelect}
         onPickerClose={() => { setGearPickerPopup(null); setPickerHoveredGroup(null); }}

frontend/src/components/korea/FleetClusterMapLayers.tsx

@@ -1,4 +1,4 @@
-import { Source, Layer, Popup } from 'react-map-gl/maplibre';
+import { Popup } from 'react-map-gl/maplibre';
 import { FONT_MONO } from '../../styles/fonts';
 import type { FleetCompany } from '../../services/vesselAnalysis';
 import type { VesselAnalysisDto } from '../../types';
@@ -8,16 +8,10 @@ import type {
   GearPickerPopupState,
   PickerCandidate,
 } from './fleetClusterTypes';
-import type { FleetClusterGeoJsonResult } from './useFleetClusterGeoJson';
-import { MODEL_ORDER, MODEL_COLORS } from './fleetClusterConstants';
 
 interface FleetClusterMapLayersProps {
-  geo: FleetClusterGeoJsonResult;
   selectedGearGroup: string | null;
-  hoveredMmsi: string | null;
-  enabledModels: Set<string>;
   expandedFleet: number | null;
-  historyActive: boolean;
   // Popup/tooltip state
   hoverTooltip: HoverTooltipState | null;
   gearPickerPopup: GearPickerPopupState | null;
@@ -26,199 +20,33 @@ interface FleetClusterMapLayersProps {
   groupPolygons: UseGroupPolygonsResult | undefined;
   companies: Map<number, FleetCompany>;
   analysisMap: Map<string, VesselAnalysisDto>;
-  // Whether any correlation trails exist (drives conditional render)
-  hasCorrelationTracks: boolean;
   // Callbacks
   onPickerHover: (group: string | null) => void;
   onPickerSelect: (candidate: PickerCandidate) => void;
   onPickerClose: () => void;
 }
 
+/**
+ * FleetCluster overlay popups/tooltips.
+ * All MapLibre Source/Layer rendering has been moved to useFleetClusterDeckLayers (deck.gl).
+ * This component only renders MapLibre Popup-based overlays (tooltips, picker).
+ */
 const FleetClusterMapLayers = ({
-  geo,
   selectedGearGroup,
-  hoveredMmsi,
-  enabledModels,
   expandedFleet,
-  historyActive,
   hoverTooltip,
   gearPickerPopup,
   pickerHoveredGroup,
   groupPolygons,
   companies,
   analysisMap,
-  hasCorrelationTracks,
   onPickerHover,
   onPickerSelect,
   onPickerClose,
 }: FleetClusterMapLayersProps) => {
-  const {
-    fleetPolygonGeoJSON,
-    lineGeoJSON,
-    hoveredGeoJSON,
-    gearClusterGeoJson,
-    memberMarkersGeoJson,
-    pickerHighlightGeoJson,
-    operationalPolygons,
-    correlationVesselGeoJson,
-    correlationTrailGeoJson,
-    modelBadgesGeoJson,
-    hoverHighlightGeoJson,
-    hoverHighlightTrailGeoJson,
-  } = geo;
 
   return (
     <>
-      {/* 선단 폴리곤 레이어 */}
-      <Source id="fleet-cluster-fill" type="geojson" data={fleetPolygonGeoJSON}>
-        <Layer
-          id="fleet-cluster-fill-layer"
-          type="fill"
-          paint={{
-            'fill-color': ['get', 'color'],
-            'fill-opacity': 0.1,
-          }}
-        />
-        <Layer
-          id="fleet-cluster-line-layer"
-          type="line"
-          paint={{
-            'line-color': ['get', 'color'],
-            'line-opacity': 0.5,
-            'line-width': 1.5,
-          }}
-        />
-      </Source>
-
-      {/* 2척 선단 라인 (서버측 Polygon 처리로 빈 컬렉션) */}
-      <Source id="fleet-cluster-line" type="geojson" data={lineGeoJSON}>
-        <Layer
-          id="fleet-cluster-line-only"
-          type="line"
-          paint={{
-            'line-color': ['get', 'color'],
-            'line-opacity': 0.5,
-            'line-width': 1.5,
-            'line-dasharray': [4, 2],
-          }}
-        />
-      </Source>
-
-      {/* 호버 하이라이트 (별도 Source) */}
-      <Source id="fleet-cluster-hovered" type="geojson" data={hoveredGeoJSON}>
-        <Layer
-          id="fleet-cluster-hovered-fill"
-          type="fill"
-          paint={{
-            'fill-color': ['get', 'color'],
-            'fill-opacity': 0.25,
-          }}
-        />
-      </Source>
-
-      {/* 선택된 어구 그룹 — 이름 기반 하이라이트 폴리곤 */}
-      {selectedGearGroup && enabledModels.has('identity') && !historyActive && (() => {
-        const allGroups = groupPolygons
-          ? [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups]
-          : [];
-        const group = allGroups.find(g => g.groupKey === selectedGearGroup);
-        if (!group?.polygon) return null;
-        const hlGeoJson: GeoJSON.FeatureCollection = {
-          type: 'FeatureCollection',
-          features: [{
-            type: 'Feature',
-            properties: {},
-            geometry: group.polygon,
-          }],
-        };
-        return (
-          <Source id="gear-cluster-selected" type="geojson" data={hlGeoJson}>
-            <Layer id="gear-selected-fill" type="fill" paint={{ 'fill-color': '#f97316', 'fill-opacity': 0.25 }} />
-            <Layer id="gear-selected-line" type="line" paint={{ 'line-color': '#f97316', 'line-width': 3, 'line-opacity': 0.9 }} />
-          </Source>
-        );
-      })()}
-
-      {/* 선택된 어구 그룹 — 모델별 오퍼레이셔널 폴리곤 오버레이 */}
-      {selectedGearGroup && !historyActive && operationalPolygons.map(op => (
-        <Source key={`op-${op.modelName}`} id={`gear-op-${op.modelName}`} type="geojson" data={op.geojson}>
-          <Layer id={`gear-op-fill-${op.modelName}`} type="fill" paint={{
-            'fill-color': op.color, 'fill-opacity': 0.12,
-          }} />
-          <Layer id={`gear-op-line-${op.modelName}`} type="line" paint={{
-            'line-color': op.color, 'line-width': 2.5, 'line-opacity': 0.8,
-            'line-dasharray': [6, 3],
-          }} />
-        </Source>
-      ))}
-
-      {/* 비허가 어구 클러스터 폴리곤 */}
-      <Source id="gear-clusters" type="geojson" data={gearClusterGeoJson}>
-        <Layer
-          id="gear-cluster-fill-layer"
-          type="fill"
-          paint={{
-            'fill-color': ['case', ['==', ['get', 'inZone'], 1], 'rgba(220, 38, 38, 0.12)', 'rgba(249, 115, 22, 0.08)'],
-          }}
-        />
-        <Layer
-          id="gear-cluster-line-layer"
-          type="line"
-          paint={{
-            'line-color': ['case', ['==', ['get', 'inZone'], 1], '#dc2626', '#f97316'],
-            'line-opacity': 0.7,
-            'line-width': ['case', ['==', ['get', 'inZone'], 1], 2, 1.5],
-            'line-dasharray': [4, 2],
-          }}
-        />
-      </Source>
-
-      {/* 가상 선박 마커 — 히스토리 재생 모드에서는 숨김 (deck.gl 레이어로 대체) */}
-      <Source id="group-member-markers" type="geojson" data={historyActive ? ({ type: 'FeatureCollection', features: [] } as GeoJSON.FeatureCollection) : memberMarkersGeoJson}>
-        <Layer
-          id="group-member-icon"
-          type="symbol"
-          layout={{
-            'icon-image': ['case', ['==', ['get', 'isGear'], 1], 'gear-diamond', 'ship-triangle'],
-            'icon-size': ['interpolate', ['linear'], ['zoom'],
-              4, ['*', ['get', 'baseSize'], 0.9],
-              6, ['*', ['get', 'baseSize'], 1.2],
-              8, ['*', ['get', 'baseSize'], 1.8],
-              10, ['*', ['get', 'baseSize'], 2.6],
-              12, ['*', ['get', 'baseSize'], 3.2],
-              13, ['*', ['get', 'baseSize'], 4.0],
-              14, ['*', ['get', 'baseSize'], 4.8],
-            ],
-            'icon-rotate': ['case', ['==', ['get', 'isGear'], 1], 0, ['get', 'cog']],
-            'icon-rotation-alignment': 'map',
-            'icon-allow-overlap': true,
-            'icon-ignore-placement': true,
-            'text-field': ['get', 'name'],
-            'text-size': ['interpolate', ['linear'], ['zoom'], 4, 6, 8, 8, 12, 10],
-            'text-offset': [0, 1.4],
-            'text-anchor': 'top',
-            'text-allow-overlap': false,
-            'text-font': ['Open Sans Regular', 'Arial Unicode MS Regular'],
-          }}
-          paint={{
-            'icon-color': ['get', 'color'],
-            'icon-halo-color': 'rgba(0,0,0,0.6)',
-            'icon-halo-width': 0.5,
-            'text-color': ['get', 'color'],
-            'text-halo-color': '#000000',
-            'text-halo-width': 1,
-          }}
-        />
-      </Source>
-
-      {/* 어구 picker 호버 하이라이트 */}
-      <Source id="gear-picker-highlight" type="geojson" data={pickerHighlightGeoJson}>
-        <Layer id="gear-picker-highlight-fill" type="fill"
-          paint={{ 'fill-color': '#ffffff', 'fill-opacity': 0.25 }} />
-        <Layer id="gear-picker-highlight-line" type="line"
-          paint={{ 'line-color': '#ffffff', 'line-width': 2, 'line-dasharray': [3, 2] }} />
-      </Source>
-
       {/* 어구 다중 선택 팝업 */}
       {gearPickerPopup && (
         <Popup longitude={gearPickerPopup.lng} latitude={gearPickerPopup.lat}
@@ -242,7 +70,7 @@ const FleetClusterMapLayers = ({
                   marginBottom: 2, borderRadius: 2,
                   backgroundColor: pickerHoveredGroup === (c.isFleet ? String(c.clusterId) : c.name) ? 'rgba(255,255,255,0.1)' : 'transparent',
                 }}>
-                <span style={{ color: c.isFleet ? '#63b3ed' : '#e2e8f0', fontSize: 9 }}>{c.isFleet ? '⚓ ' : ''}{c.name}</span>
+                <span style={{ color: c.isFleet ? '#63b3ed' : '#e2e8f0', fontSize: 9 }}>{c.isFleet ? '\u2693 ' : ''}{c.name}</span>
                 <span style={{ color: '#64748b', marginLeft: 4 }}>({c.count}{c.isFleet ? '척' : '개'})</span>
               </div>
             ))}
@@ -272,7 +100,7 @@ const FleetClusterMapLayers = ({
                   const role = dto?.algorithms.fleetRole.role ?? m.role;
                   return (
                     <div key={m.mmsi} style={{ fontSize: 9, color: '#7ea8c4', marginTop: 2 }}>
-                      {role === 'LEADER' ? '★' : '·'} {m.name || m.mmsi} <span style={{ color: '#4a6b82' }}>{m.sog.toFixed(1)}kt</span>
+                      {role === 'LEADER' ? '\u2605' : '\u00B7'} {m.name || m.mmsi} <span style={{ color: '#4a6b82' }}>{m.sog.toFixed(1)}kt</span>
                     </div>
                   );
                 })}
@@ -286,10 +114,13 @@ const FleetClusterMapLayers = ({
           const allGroups = groupPolygons
             ? [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups]
             : [];
-          const group = allGroups.find(g => g.groupKey === name);
-          if (!group) return null;
-          const parentMember = group.members.find(m => m.isParent);
-          const gearMembers = group.members.filter(m => !m.isParent);
+          const matches = allGroups.filter(g => g.groupKey === name);
+          if (matches.length === 0) return null;
+          const seen = new Set<string>();
+          const mergedMembers: typeof matches[0]['members'] = [];
+          for (const g of matches) for (const m of g.members) { if (!seen.has(m.mmsi)) { seen.add(m.mmsi); mergedMembers.push(m); } }
+          const parentMember = mergedMembers.find(m => m.isParent);
+          const gearMembers = mergedMembers.filter(m => !m.isParent);
           return (
             <Popup longitude={hoverTooltip.lng} latitude={hoverTooltip.lat}
               closeButton={false} closeOnClick={false} anchor="bottom"
@@ -314,82 +145,6 @@ const FleetClusterMapLayers = ({
         }
         return null;
       })()}
-
-      {/* ── 연관 대상 트레일 + 마커 (비재생 모드) ── */}
-      {selectedGearGroup && !historyActive && hasCorrelationTracks && (
-        <Source id="correlation-trails" type="geojson" data={correlationTrailGeoJson}>
-          <Layer id="correlation-trails-line" type="line" paint={{
-            'line-color': ['get', 'color'], 'line-width': 2, 'line-opacity': 0.6,
-            'line-dasharray': [6, 3],
-          }} />
-        </Source>
-      )}
-      {selectedGearGroup && !historyActive && (
-        <Source id="correlation-vessels" type="geojson" data={correlationVesselGeoJson}>
-          <Layer id="correlation-vessels-icon" type="symbol" layout={{
-            'icon-image': ['case', ['==', ['get', 'isVessel'], 1], 'ship-triangle', 'gear-diamond'],
-            'icon-size': ['case', ['==', ['get', 'isVessel'], 1], 0.7, 0.5],
-            'icon-rotate': ['case', ['==', ['get', 'isVessel'], 1], ['get', 'cog'], 0],
-            'icon-rotation-alignment': 'map',
-            'icon-allow-overlap': true,
-          }} paint={{
-            'icon-color': ['get', 'color'],
-            'icon-halo-color': 'rgba(0,0,0,0.6)',
-            'icon-halo-width': 1,
-          }} />
-          <Layer id="correlation-vessels-label" type="symbol" layout={{
-            'text-field': ['get', 'name'],
-            'text-size': 8,
-            'text-offset': [0, 1.5],
-            'text-allow-overlap': false,
-          }} paint={{
-            'text-color': ['get', 'color'],
-            'text-halo-color': 'rgba(0,0,0,0.8)',
-            'text-halo-width': 1,
-          }} />
-        </Source>
-      )}
-
-      {/* ── 모델 배지 (비재생 모드) ── */}
-      {selectedGearGroup && !historyActive && (
-        <Source id="model-badges" type="geojson" data={modelBadgesGeoJson}>
-          {MODEL_ORDER.map((model, i) => (
-            enabledModels.has(model) ? (
-              <Layer key={`badge-${model}`} id={`model-badge-${model}`} type="circle"
-                filter={['==', ['get', `m${i}`], 1]}
-                paint={{
-                  'circle-radius': 3,
-                  'circle-color': MODEL_COLORS[model] ?? '#94a3b8',
-                  'circle-stroke-width': 0.5,
-                  'circle-stroke-color': 'rgba(0,0,0,0.6)',
-                  'circle-translate': [10 + i * 7, -6],
-                }}
-              />
-            ) : null
-          ))}
-        </Source>
-      )}
-
-      {/* ── 호버 하이라이트 (비재생 모드) ── */}
-      {hoveredMmsi && !historyActive && (
-        <Source id="hover-highlight-point" type="geojson" data={hoverHighlightGeoJson}>
-          <Layer id="hover-highlight-glow" type="circle" paint={{
-            'circle-radius': 14, 'circle-color': '#ffffff', 'circle-opacity': 0.25,
-            'circle-blur': 0.8,
-          }} />
-          <Layer id="hover-highlight-ring" type="circle" paint={{
-            'circle-radius': 8, 'circle-color': 'transparent',
-            'circle-stroke-width': 2, 'circle-stroke-color': '#ffffff',
-          }} />
-        </Source>
-      )}
-      {hoveredMmsi && !historyActive && (
-        <Source id="hover-highlight-trail" type="geojson" data={hoverHighlightTrailGeoJson}>
-          <Layer id="hover-highlight-trail-line" type="line" paint={{
-            'line-color': '#ffffff', 'line-width': 3, 'line-opacity': 0.7,
-          }} />
-        </Source>
-      )}
     </>
   );
 };

frontend/src/components/korea/HistoryReplayController.tsx

@@ -13,6 +13,7 @@ const HistoryReplayController = ({ onClose, onFilterByScore }: HistoryReplayCont
   const frameCount = useGearReplayStore(s => s.historyFrames.length);
   const showTrails = useGearReplayStore(s => s.showTrails);
   const showLabels = useGearReplayStore(s => s.showLabels);
+  const focusMode = useGearReplayStore(s => s.focusMode);
 
   const progressBarRef = useRef<HTMLInputElement>(null);
   const progressIndicatorRef = useRef<HTMLDivElement>(null);
@@ -46,11 +47,14 @@ const HistoryReplayController = ({ onClose, onFilterByScore }: HistoryReplayCont
 
   return (
     <div style={{
-      position: 'absolute', bottom: 20, left: '50%', transform: 'translateX(-50%)',
+      position: 'absolute', bottom: 20,
+      left: 'calc(50% + 100px)', transform: 'translateX(-50%)',
+      width: 'calc(100vw - 880px)',
+      minWidth: 380, maxWidth: 1320,
       background: 'rgba(12,24,37,0.95)', border: '1px solid rgba(99,179,237,0.25)',
       borderRadius: 8, padding: '8px 14px', display: 'flex', flexDirection: 'column', gap: 4,
       zIndex: 20, fontFamily: FONT_MONO, fontSize: 10, color: '#e2e8f0',
-      boxShadow: '0 4px 16px rgba(0,0,0,0.5)', pointerEvents: 'auto', minWidth: 420,
+      boxShadow: '0 4px 16px rgba(0,0,0,0.5)', pointerEvents: 'auto',
     }}>
       {/* 프로그레스 바 */}
       <div style={{ position: 'relative', height: 8, background: 'rgba(255,255,255,0.05)', borderRadius: 4, overflow: 'hidden' }}>
@@ -99,6 +103,11 @@ const HistoryReplayController = ({ onClose, onFilterByScore }: HistoryReplayCont
           style={showLabels ? btnActiveStyle : btnStyle} title="이름 표시">
           이름
         </button>
+        <button type="button" onClick={() => store.getState().setFocusMode(!focusMode)}
+          style={focusMode ? { ...btnStyle, background: 'rgba(239,68,68,0.15)', color: '#f87171', borderColor: 'rgba(239,68,68,0.4)' } : btnStyle}
+          title="집중 모드 — 주변 라이브 정보 숨김">
+          집중
+        </button>
         <span style={{ color: '#475569', margin: '0 2px' }}>|</span>
         <span style={{ color: '#64748b', fontSize: 9 }}>일치율</span>
         <select

frontend/src/components/korea/KoreaMap.tsx

@@ -13,7 +13,11 @@ import { useStaticDeckLayers } from '../../hooks/useStaticDeckLayers';
 import { useGearReplayLayers } from '../../hooks/useGearReplayLayers';
 import type { StaticPickInfo } from '../../hooks/useStaticDeckLayers';
 import fishingZonesData from '../../data/zones/fishing-zones-wgs84.json';
-import { ShipLayer } from '../layers/ShipLayer';
+import { useGearReplayStore } from '../../stores/gearReplayStore';
+import { useShipDeckLayers } from '../../hooks/useShipDeckLayers';
+import { useShipDeckStore } from '../../stores/shipDeckStore';
+import { ShipPopupOverlay, ShipHoverTooltip } from '../layers/ShipPopupOverlay';
+import maplibregl from 'maplibre-gl';
 import { InfraLayer } from './InfraLayer';
 import { SatelliteLayer } from '../layers/SatelliteLayer';
 import { AircraftLayer } from '../layers/AircraftLayer';
@@ -215,6 +219,12 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
   const mapRef = useRef<MapRef>(null);
   const overlayRef = useRef<MapboxOverlay | null>(null);
   const replayLayerRef = useRef<DeckLayer[]>([]);
+  const fleetClusterLayerRef = useRef<DeckLayer[]>([]);
+  const requestRenderRef = useRef<(() => void) | null>(null);
+  const handleFleetDeckLayers = useCallback((layers: DeckLayer[]) => {
+    fleetClusterLayerRef.current = layers;
+    requestRenderRef.current?.();
+  }, []);
   const [infra, setInfra] = useState<PowerFacility[]>([]);
   const [flyToTarget, setFlyToTarget] = useState<{ lng: number; lat: number; zoom: number } | null>(null);
   const [selectedAnalysisMmsi, setSelectedAnalysisMmsi] = useState<string | null>(null);
@@ -229,15 +239,18 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
     if (z !== zoomRef.current) {
       zoomRef.current = z;
       setZoomLevel(z);
+      useShipDeckStore.getState().setZoomLevel(z);
     }
   }, []);
   const [staticPickInfo, setStaticPickInfo] = useState<StaticPickInfo | null>(null);
   const handleStaticPick = useCallback((info: StaticPickInfo) => setStaticPickInfo(info), []);
   const [analysisPanelOpen, setAnalysisPanelOpen] = useLocalStorage('analysisPanelOpen', false);
   const [activeBadgeFilter, setActiveBadgeFilter] = useState<string | null>(null);
+  const replayFocusMode = useGearReplayStore(s => s.focusMode);
 
-  // ── deck.gl 리플레이 레이어 (Zustand → imperative setProps, React 렌더 우회) ──
+  // ── deck.gl 레이어 (Zustand → imperative setProps, React 렌더 우회) ──
   const reactLayersRef = useRef<DeckLayer[]>([]);
+  const shipLayerRef = useRef<DeckLayer[]>([]);
   type ShipPos = { lng: number; lat: number; course?: number };
   const shipsRef = useRef(new globalThis.Map<string, ShipPos>());
   // live 선박 위치를 ref에 동기화 (리플레이 fallback용)
@@ -248,16 +261,62 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
 
   const requestRender = useCallback(() => {
     if (!overlayRef.current) return;
+    const focus = useGearReplayStore.getState().focusMode;
     overlayRef.current.setProps({
-      layers: [...reactLayersRef.current, ...replayLayerRef.current],
+      layers: focus
+        ? [...replayLayerRef.current]
+        : [...reactLayersRef.current, ...fleetClusterLayerRef.current, ...shipLayerRef.current, ...replayLayerRef.current],
     });
   }, []);
+  requestRenderRef.current = requestRender;
+  useShipDeckLayers(shipLayerRef, requestRender);
   useGearReplayLayers(replayLayerRef, requestRender, shipsRef);
 
   useEffect(() => {
     fetchKoreaInfra().then(setInfra).catch(() => {});
   }, []);
 
+  // MapLibre에 ship-triangle/gear-diamond SDF 이미지 등록 (FleetClusterMapLayers에서 사용)
+  const handleMapLoad = useCallback(() => {
+    const m = mapRef.current?.getMap() as maplibregl.Map | undefined;
+    if (!m) return;
+    if (!m.hasImage('ship-triangle')) {
+      const s = 64;
+      const c = document.createElement('canvas'); c.width = s; c.height = s;
+      const ctx = c.getContext('2d')!;
+      ctx.beginPath(); ctx.moveTo(s/2,2); ctx.lineTo(s*0.12,s-2); ctx.lineTo(s/2,s*0.62); ctx.lineTo(s*0.88,s-2); ctx.closePath();
+      ctx.fillStyle = '#fff'; ctx.fill();
+      const d = ctx.getImageData(0,0,s,s);
+      m.addImage('ship-triangle', { width: s, height: s, data: new Uint8Array(d.data.buffer) }, { sdf: true });
+    }
+    if (!m.hasImage('gear-diamond')) {
+      const s = 64;
+      const c = document.createElement('canvas'); c.width = s; c.height = s;
+      const ctx = c.getContext('2d')!;
+      ctx.beginPath(); ctx.moveTo(s/2,4); ctx.lineTo(s-4,s/2); ctx.lineTo(s/2,s-4); ctx.lineTo(4,s/2); ctx.closePath();
+      ctx.fillStyle = '#fff'; ctx.fill();
+      const d = ctx.getImageData(0,0,s,s);
+      m.addImage('gear-diamond', { width: s, height: s, data: new Uint8Array(d.data.buffer) }, { sdf: true });
+    }
+  }, []);
+
+  // ── shipDeckStore 동기화 ──
+  useEffect(() => {
+    useShipDeckStore.getState().setShips(allShipsList);
+  }, [allShipsList]);
+
+  useEffect(() => {
+    useShipDeckStore.getState().setFilters({
+      militaryOnly: layers.militaryOnly,
+      layerVisible: layers.ships,
+      hiddenShipCategories,
+      hiddenNationalities,
+    });
+  }, [layers.militaryOnly, layers.ships, hiddenShipCategories, hiddenNationalities]);
+
+  // Korea 탭에서는 한국선박 강조 OFF (Iran 탭 전용 기능)
+  // highlightKorean 기본값 false 유지
+
   useEffect(() => {
     if (flyToTarget && mapRef.current) {
       mapRef.current.flyTo({ center: [flyToTarget.lng, flyToTarget.lat], zoom: flyToTarget.zoom, duration: 1500 });
@@ -289,12 +348,10 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
   const handleFleetZoom = useCallback((bounds: { minLat: number; maxLat: number; minLng: number; maxLng: number }) => {
     mapRef.current?.fitBounds(
       [[bounds.minLng, bounds.minLat], [bounds.maxLng, bounds.maxLat]],
-      { padding: 60, duration: 1500, maxZoom: 12 },
+      { padding: 60, duration: 1500, maxZoom: 10 },
     );
   }, []);
 
-  const anyKoreaFilterOn = koreaFilters.illegalFishing || koreaFilters.illegalTransship || koreaFilters.darkVessel || koreaFilters.cableWatch || koreaFilters.dokdoWatch || koreaFilters.ferryWatch || koreaFilters.cnFishing;
-
   // 줌 레벨별 아이콘/심볼 스케일 배율 — z4=0.8x, z6=1.0x 시작, 2단계씩 상향
   const zoomScale = useMemo(() => {
     if (zoomLevel <= 4) return 0.8;
@@ -429,7 +486,7 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
 
   // 선택된 어구 그룹 — 어구 아이콘 + 모선 강조 (deck.gl)
   const selectedGearLayers = useMemo(() => {
-    if (!selectedGearData) return [];
+    if (!selectedGearData || replayFocusMode) return [];
     const { parent, gears, groupName } = selectedGearData;
     const layers = [];
 
@@ -507,11 +564,11 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
     }
 
     return layers;
-  }, [selectedGearData, zoomScale, fontScale.analysis]);
+  }, [selectedGearData, zoomScale, fontScale.analysis, replayFocusMode]);
 
   // 선택된 선단 소속 선박 강조 레이어 (deck.gl)
   const selectedFleetLayers = useMemo(() => {
-    if (!selectedFleetData) return [];
+    if (!selectedFleetData || replayFocusMode) return [];
     const { ships: fleetShips, clusterId } = selectedFleetData;
     if (fleetShips.length === 0) return [];
 
@@ -526,7 +583,7 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
     const color: [number, number, number, number] = [r, g, b, 255];
     const fillColor: [number, number, number, number] = [r, g, b, 80];
 
-    const result: Layer[] = [];
+    const result: DeckLayer[] = [];
 
     // 소속 선박 — 강조 원형
     result.push(new ScatterplotLayer({
@@ -593,7 +650,7 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
     }
 
     return result;
-  }, [selectedFleetData, zoomScale, vesselAnalysis, fontScale.analysis]);
+  }, [selectedFleetData, zoomScale, vesselAnalysis, fontScale.analysis, replayFocusMode]);
 
   // 분석 결과 deck.gl 레이어
   const analysisActiveFilter = koreaFilters.illegalFishing ? 'illegalFishing'
@@ -601,28 +658,16 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
     : koreaFilters.cnFishing ? 'cnFishing'
     : null;
 
-  // AI 분석 가상 선박 마커 GeoJSON (분석 대상 선박을 삼각형으로 표시)
-  const analysisShipMarkersGeoJson = useMemo(() => {
-    const features: GeoJSON.Feature[] = [];
-    if (!vesselAnalysis || !analysisActiveFilter) return { type: 'FeatureCollection' as const, features };
-    const allS = allShips ?? ships;
-    for (const s of allS) {
-      const dto = vesselAnalysis.analysisMap.get(s.mmsi);
-      if (!dto) continue;
-      const level = dto.algorithms.riskScore.level;
-      const color = level === 'CRITICAL' ? '#ef4444' : level === 'HIGH' ? '#f97316' : level === 'MEDIUM' ? '#eab308' : '#22c55e';
-      const isGear = /^.+?_\d+_\d+_?$/.test(s.name || '') ? 1 : 0;
-      features.push({
-        type: 'Feature',
-        properties: { mmsi: s.mmsi, name: s.name || s.mmsi, cog: s.heading ?? 0, color, baseSize: 0.16, isGear },
-        geometry: { type: 'Point', coordinates: [s.lng, s.lat] },
-      });
-    }
-    return { type: 'FeatureCollection' as const, features };
-  }, [vesselAnalysis, analysisActiveFilter, allShips, ships]);
+  // shipDeckStore에 분석 상태 동기화
+  useEffect(() => {
+    useShipDeckStore.getState().setAnalysis(
+      vesselAnalysis?.analysisMap ?? null,
+      analysisActiveFilter,
+    );
+  }, [vesselAnalysis?.analysisMap, analysisActiveFilter]);
 
   const analysisDeckLayers = useAnalysisDeckLayers(
-    vesselAnalysis?.analysisMap ?? new Map(),
+    vesselAnalysis?.analysisMap ?? (new globalThis.Map() as globalThis.Map<string, import('../../types').VesselAnalysisDto>),
     allShips ?? ships,
     analysisActiveFilter,
     zoomScale,
@@ -635,6 +680,7 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
       style={{ width: '100%', height: '100%' }}
       mapStyle={MAP_STYLE}
       onZoom={handleZoom}
+      onLoad={handleMapLoad}
     >
       <NavigationControl position="top-right" />
 
@@ -702,13 +748,7 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
         />
       </Source>
 
-      {layers.ships && <ShipLayer
-        ships={anyKoreaFilterOn ? ships : (allShips ?? ships)}
-        militaryOnly={layers.militaryOnly}
-        analysisMap={vesselAnalysis?.analysisMap}
-        hiddenShipCategories={hiddenShipCategories}
-        hiddenNationalities={hiddenNationalities}
-      />}
+      {/* ShipLayer → deck.gl (useShipDeckLayers) 전환 완료 */}
       {/* Transship suspect labels — Marker DOM, inline styles kept for dynamic border color */}
       {transshipSuspects.size > 0 && ships.filter(s => transshipSuspects.has(s.mmsi)).map(s => (
         <Marker key={`ts-${s.mmsi}`} longitude={s.lng} latitude={s.lat} anchor="bottom">
@@ -780,13 +820,15 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
           analysisMap={vesselAnalysis ? vesselAnalysis.analysisMap : undefined}
           clusters={vesselAnalysis ? vesselAnalysis.clusters : undefined}
           groupPolygons={groupPolygons}
+          zoomScale={zoomScale}
+          onDeckLayersChange={handleFleetDeckLayers}
           onShipSelect={handleAnalysisShipSelect}
           onFleetZoom={handleFleetZoom}
           onSelectedGearChange={setSelectedGearData}
           onSelectedFleetChange={setSelectedFleetData}
         />
       )}
-      {vesselAnalysis && vesselAnalysis.analysisMap.size > 0 && (
+      {vesselAnalysis && vesselAnalysis.analysisMap.size > 0 && !replayFocusMode && (
         <AnalysisOverlay
           ships={allShips ?? ships}
           analysisMap={vesselAnalysis.analysisMap}
@@ -795,42 +837,17 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
         />
       )}
 
-      {/* AI 분석 가상 선박 마커 (삼각형 + 방향 + 줌 스케일) */}
-      {analysisActiveFilter && (
-        <Source id="analysis-ship-markers" type="geojson" data={analysisShipMarkersGeoJson}>
-          <Layer
-            id="analysis-ship-icon"
-            type="symbol"
-            layout={{
-              'icon-image': ['case', ['==', ['get', 'isGear'], 1], 'gear-diamond', 'ship-triangle'],
-              'icon-size': ['interpolate', ['linear'], ['zoom'],
-                4, ['*', ['get', 'baseSize'], 1.0],
-                6, ['*', ['get', 'baseSize'], 1.3],
-                8, ['*', ['get', 'baseSize'], 2.0],
-                10, ['*', ['get', 'baseSize'], 2.8],
-                12, ['*', ['get', 'baseSize'], 3.5],
-                13, ['*', ['get', 'baseSize'], 4.2],
-                14, ['*', ['get', 'baseSize'], 5.0],
-              ],
-              'icon-rotate': ['case', ['==', ['get', 'isGear'], 1], 0, ['get', 'cog']],
-              'icon-rotation-alignment': 'map',
-              'icon-allow-overlap': true,
-              'icon-ignore-placement': true,
-            }}
-            paint={{
-              'icon-color': ['get', 'color'],
-              'icon-halo-color': 'rgba(0,0,0,0.6)',
-              'icon-halo-width': 0.5,
-            }}
-          />
-        </Source>
-      )}
+      {/* analysisShipMarkers → deck.gl (useShipDeckLayers) 전환 완료 */}
+
+      {/* 선박 호버 툴팁 + 클릭 팝업 — React 오버레이 (MapLibre Popup 대체) */}
+      <ShipHoverTooltip />
+      <ShipPopupOverlay />
 
       {/* deck.gl GPU 오버레이 — 정적 + 리플레이 레이어 합성 */}
       <DeckGLOverlay
         overlayRef={overlayRef}
         layers={(() => {
-          const base = [
+          const base = replayFocusMode ? [] : [
             ...staticDeckLayers,
             illegalFishingLayer,
             illegalFishingLabelLayer,
@@ -838,9 +855,9 @@ export function KoreaMap({ ships, allShips, aircraft, satellites, layers, osintF
             ...selectedGearLayers,
             ...selectedFleetLayers,
             ...(analysisPanelOpen ? analysisDeckLayers : []),
-          ].filter(Boolean);
+          ].filter(Boolean) as DeckLayer[];
           reactLayersRef.current = base;
-          return [...base, ...replayLayerRef.current];
+          return [...base, ...fleetClusterLayerRef.current, ...shipLayerRef.current, ...replayLayerRef.current];
         })()}
       />
       {/* 정적 마커 클릭 Popup — 통합 리치 디자인 */}

frontend/src/components/korea/useFleetClusterGeoJson.ts

@@ -48,6 +48,26 @@ export interface FleetClusterGeoJsonResult {
 
 const EMPTY_FC: GeoJSON = { type: 'FeatureCollection', features: [] };
 
+// 선단 색상: 바다색(짙은파랑)과 대비되는 밝은 파스텔 팔레트 (clusterId 해시)
+const FLEET_PALETTE = [
+  '#e879f9', '#a78bfa', '#67e8f9', '#34d399', '#fbbf24',
+  '#fb923c', '#f87171', '#a3e635', '#38bdf8', '#c084fc',
+];
+
+/** 같은 groupKey의 모든 서브클러스터에서 멤버를 합산 (중복 mmsi 제거) */
+function mergeSubClusterMembers(groups: GroupPolygonDto[], groupKey: string) {
+  const matches = groups.filter(g => g.groupKey === groupKey);
+  if (matches.length === 0) return { members: [] as GroupPolygonDto['members'], groups: matches };
+  const seen = new Set<string>();
+  const members: GroupPolygonDto['members'] = [];
+  for (const g of matches) {
+    for (const m of g.members) {
+      if (!seen.has(m.mmsi)) { seen.add(m.mmsi); members.push(m); }
+    }
+  }
+  return { members, groups: matches };
+}
+
 export function useFleetClusterGeoJson(params: UseFleetClusterGeoJsonParams): FleetClusterGeoJsonResult {
   const {
     ships,
@@ -70,9 +90,11 @@ export function useFleetClusterGeoJson(params: UseFleetClusterGeoJsonParams): Fl
     if (!groupPolygons) return { type: 'FeatureCollection', features };
     for (const g of groupPolygons.fleetGroups) {
       if (!g.polygon) continue;
+      const cid = Number(g.groupKey);
+      const color = FLEET_PALETTE[cid % FLEET_PALETTE.length];
       features.push({
         type: 'Feature',
-        properties: { clusterId: Number(g.groupKey), color: g.color },
+        properties: { clusterId: cid, color },
         geometry: g.polygon,
       });
     }
@@ -93,7 +115,7 @@ export function useFleetClusterGeoJson(params: UseFleetClusterGeoJsonParams): Fl
       type: 'FeatureCollection',
       features: [{
         type: 'Feature',
-        properties: { clusterId: hoveredFleetId, color: g.color },
+        properties: { clusterId: hoveredFleetId, color: FLEET_PALETTE[hoveredFleetId % FLEET_PALETTE.length] },
         geometry: g.polygon,
       }],
     };
@@ -124,9 +146,9 @@ export function useFleetClusterGeoJson(params: UseFleetClusterGeoJsonParams): Fl
   const operationalPolygons = useMemo(() => {
     if (!selectedGearGroup || !groupPolygons) return [];
     const allGroups = [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups];
-    const group = allGroups.find(g => g.groupKey === selectedGearGroup);
-    if (!group) return [];
-    const basePts: [number, number][] = group.members.map(m => [m.lon, m.lat]);
+    const { members: mergedMembers } = mergeSubClusterMembers(allGroups, selectedGearGroup);
+    if (mergedMembers.length === 0) return [];
+    const basePts: [number, number][] = mergedMembers.map(m => [m.lon, m.lat]);
     const result: { modelName: string; color: string; geojson: GeoJSON.FeatureCollection }[] = [];
     for (const [mn, items] of correlationByModel) {
       if (!enabledModels.has(mn)) continue;
@@ -152,11 +174,11 @@ export function useFleetClusterGeoJson(params: UseFleetClusterGeoJsonParams): Fl
     return result;
   }, [selectedGearGroup, groupPolygons, correlationByModel, enabledModels, ships]);
 
-  // 어구 클러스터 GeoJSON (서버 제공)
+  // 어구 클러스터 GeoJSON — allGroups에서 직접 (서브클러스터별 개별 폴리곤 유지)
   const gearClusterGeoJson = useMemo((): GeoJSON => {
     const features: GeoJSON.Feature[] = [];
     if (!groupPolygons) return { type: 'FeatureCollection', features };
-    for (const g of [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups]) {
+    for (const g of groupPolygons.allGroups.filter(x => x.groupType !== 'FLEET')) {
       if (!g.polygon) continue;
       features.push({
         type: 'Feature',
@@ -205,7 +227,9 @@ export function useFleetClusterGeoJson(params: UseFleetClusterGeoJsonParams): Fl
     };
 
     for (const g of groupPolygons.fleetGroups) {
-      for (const m of g.members) addMember(m, g.groupKey, 'FLEET', g.color);
+      const cid = Number(g.groupKey);
+      const fleetColor = FLEET_PALETTE[cid % FLEET_PALETTE.length];
+      for (const m of g.members) addMember(m, g.groupKey, 'FLEET', fleetColor);
     }
     for (const g of [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups]) {
       const color = g.groupType === 'GEAR_IN_ZONE' ? '#dc2626' : '#f97316';
@@ -231,15 +255,15 @@ export function useFleetClusterGeoJson(params: UseFleetClusterGeoJsonParams): Fl
     const allGroups = groupPolygons
       ? [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups]
       : [];
-    const group = allGroups.find(g => g.groupKey === selectedGearGroup);
-    if (!group?.polygon) return null;
+    const matches = allGroups.filter(g => g.groupKey === selectedGearGroup && g.polygon);
+    if (matches.length === 0) return null;
     return {
       type: 'FeatureCollection',
-      features: [{
-        type: 'Feature',
-        properties: {},
-        geometry: group.polygon,
-      }],
+      features: matches.map(g => ({
+        type: 'Feature' as const,
+        properties: { subClusterId: g.subClusterId },
+        geometry: g.polygon!,
+      })),
     };
   }, [selectedGearGroup, enabledModels, historyActive, groupPolygons]);
 
@@ -303,7 +327,7 @@ export function useFleetClusterGeoJson(params: UseFleetClusterGeoJsonParams): Fl
 
     if (enabledModels.has('identity') && groupPolygons) {
       const all = [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups];
-      const members = all.find(g => g.groupKey === selectedGearGroup)?.members ?? [];
+      const { members } = mergeSubClusterMembers(all, selectedGearGroup);
       for (const m of members) {
         const e = targets.get(m.mmsi) ?? { lon: m.lon, lat: m.lat, models: new Set<string>() };
         e.lon = m.lon; e.lat = m.lat; e.models.add('identity');
@@ -336,7 +360,8 @@ export function useFleetClusterGeoJson(params: UseFleetClusterGeoJsonParams): Fl
     if (!hoveredMmsi || !selectedGearGroup) return EMPTY_FC;
     if (groupPolygons) {
       const all = [...groupPolygons.gearInZoneGroups, ...groupPolygons.gearOutZoneGroups];
-      const m = all.find(g => g.groupKey === selectedGearGroup)?.members.find(x => x.mmsi === hoveredMmsi);
+      const { members: allMembers } = mergeSubClusterMembers(all, selectedGearGroup);
+      const m = allMembers.find(x => x.mmsi === hoveredMmsi);
       if (m) return { type: 'FeatureCollection', features: [{ type: 'Feature', properties: {}, geometry: { type: 'Point', coordinates: [m.lon, m.lat] } }] };
     }
     const s = ships.find(x => x.mmsi === hoveredMmsi);
@@ -363,7 +388,7 @@ export function useFleetClusterGeoJson(params: UseFleetClusterGeoJsonParams): Fl
       label: g.groupLabel,
       memberCount: g.memberCount,
       areaSqNm: g.areaSqNm,
-      color: g.color,
+      color: FLEET_PALETTE[Number(g.groupKey) % FLEET_PALETTE.length],
       members: g.members,
     })).sort((a, b) => b.memberCount - a.memberCount);
   }, [groupPolygons]);

frontend/src/components/layers/ShipPopupOverlay.tsx

@@ -0,0 +1,675 @@
+import { memo, useMemo, useState, useEffect, useRef, useCallback } from 'react';
+import { useMap } from 'react-map-gl/maplibre';
+import { useTranslation } from 'react-i18next';
+import type { Ship } from '../../types';
+import { MT_TYPE_COLORS, getMTType, NAVY_COLORS, FLAG_EMOJI, isMilitary } from '../../utils/shipClassification';
+import { useShipDeckStore } from '../../stores/shipDeckStore';
+
+// ── Local Korean ship photos ──────────────────────────────────────────────────
+
+const LOCAL_SHIP_PHOTOS: Record<string, string> = {
+  '440034000': '/ships/440034000.jpg',
+  '440150000': '/ships/440150000.jpg',
+  '440272000': '/ships/440272000.jpg',
+  '440274000': '/ships/440274000.jpg',
+  '440323000': '/ships/440323000.jpg',
+  '440384000': '/ships/440384000.jpg',
+  '440880000': '/ships/440880000.jpg',
+  '441046000': '/ships/441046000.jpg',
+  '441345000': '/ships/441345000.jpg',
+  '441353000': '/ships/441353000.jpg',
+  '441393000': '/ships/441393000.jpg',
+  '441423000': '/ships/441423000.jpg',
+  '441548000': '/ships/441548000.jpg',
+  '441708000': '/ships/441708000.png',
+  '441866000': '/ships/441866000.jpg',
+};
+
+interface VesselPhotoData {
+  url: string;
+}
+
+const vesselPhotoCache = new Map<string, VesselPhotoData | null>();
+
+type PhotoSource = 'spglobal' | 'marinetraffic';
+
+interface VesselPhotoProps {
+  mmsi: string;
+  imo?: string;
+  shipImagePath?: string | null;
+  shipImageCount?: number;
+}
+
+/**
+ * S&P Global 이미지 목록 API 응답
+ * GET /signal-batch/api/v1/shipimg/{imo}
+ * path에 _1.jpg(썸네일) / _2.jpg(원본) 을 붙여서 사용
+ */
+interface SpgImageInfo {
+  picId: number;
+  path: string;       // e.g. "/shipimg/22738/2273823"
+  copyright: string;
+  date: string;
+}
+
+const spgImageCache = new Map<string, SpgImageInfo[] | null>();
+
+async function fetchSpgImages(imo: string): Promise<SpgImageInfo[]> {
+  if (spgImageCache.has(imo)) return spgImageCache.get(imo) || [];
+  try {
+    const res = await fetch(`/signal-batch/api/v1/shipimg/${imo}`);
+    if (!res.ok) throw new Error(`${res.status}`);
+    const data: SpgImageInfo[] = await res.json();
+    spgImageCache.set(imo, data);
+    return data;
+  } catch {
+    spgImageCache.set(imo, null);
+    return [];
+  }
+}
+
+function VesselPhoto({ mmsi, imo, shipImagePath }: VesselPhotoProps) {
+  const localUrl = LOCAL_SHIP_PHOTOS[mmsi];
+  const hasSPGlobal = !!shipImagePath;
+  const [activeTab, setActiveTab] = useState<PhotoSource>(hasSPGlobal ? 'spglobal' : 'marinetraffic');
+  const [spgSlideIdx, setSpgSlideIdx] = useState(0);
+  const [spgErrors, setSpgErrors] = useState<Set<number>>(new Set());
+  const [spgImages, setSpgImages] = useState<SpgImageInfo[]>([]);
+
+  useEffect(() => {
+    setActiveTab(hasSPGlobal ? 'spglobal' : 'marinetraffic');
+    setSpgSlideIdx(0);
+    setSpgErrors(new Set());
+    setSpgImages([]);
+
+    if (imo && hasSPGlobal) {
+      fetchSpgImages(imo).then(setSpgImages);
+    } else if (shipImagePath) {
+      setSpgImages([{ picId: 0, path: shipImagePath.replace(/_[12]\.\w+$/, ''), copyright: '', date: '' }]);
+    }
+  }, [mmsi, imo, hasSPGlobal, shipImagePath]);
+
+  const spgUrls = useMemo(
+    () => spgImages.map(img => `${img.path}_2.jpg`),
+    [spgImages],
+  );
+  const validSpgCount = spgUrls.length;
+
+  const [mtPhoto, setMtPhoto] = useState<VesselPhotoData | null | undefined>(() => {
+    return vesselPhotoCache.has(mmsi) ? vesselPhotoCache.get(mmsi) : undefined;
+  });
+
+  useEffect(() => {
+    setMtPhoto(vesselPhotoCache.has(mmsi) ? vesselPhotoCache.get(mmsi) : undefined);
+  }, [mmsi]);
+
+  useEffect(() => {
+    if (activeTab !== 'marinetraffic') return;
+    if (mtPhoto !== undefined) return;
+    const imgUrl = `https://photos.marinetraffic.com/ais/showphoto.aspx?mmsi=${mmsi}&size=thumb300`;
+    const img = new Image();
+    img.onload = () => {
+      const result = { url: imgUrl };
+      vesselPhotoCache.set(mmsi, result);
+      setMtPhoto(result);
+    };
+    img.onerror = () => {
+      vesselPhotoCache.set(mmsi, null);
+      setMtPhoto(null);
+    };
+    img.src = imgUrl;
+  }, [mmsi, activeTab, mtPhoto]);
+
+  let currentUrl: string | null = null;
+  if (localUrl) {
+    currentUrl = localUrl;
+  } else if (activeTab === 'spglobal' && spgUrls.length > 0 && !spgErrors.has(spgSlideIdx)) {
+    currentUrl = spgUrls[spgSlideIdx];
+  } else if (activeTab === 'marinetraffic' && mtPhoto) {
+    currentUrl = mtPhoto.url;
+  }
+
+  if (localUrl) {
+    return (
+      <div className="mb-1.5">
+        <div className="vessel-photo-frame w-full rounded overflow-hidden bg-black/30">
+          <img
+            src={localUrl}
+            alt="Vessel"
+            className="w-full h-full object-contain"
+            onError={(e) => { (e.target as HTMLImageElement).style.display = 'none'; }}
+          />
+        </div>
+      </div>
+    );
+  }
+
+  const allSpgFailed = spgUrls.length > 0 && spgUrls.every((_, i) => spgErrors.has(i));
+  const noPhoto = (!hasSPGlobal || allSpgFailed) && mtPhoto === null;
+
+  return (
+    <div className="mb-1.5">
+      <div className="flex mb-1">
+        {hasSPGlobal && (
+          <div
+            className={`flex-1 py-1.5 text-center cursor-pointer transition-all text-[12px] font-bold tracking-wide border-b-2 ${
+              activeTab === 'spglobal'
+                ? 'border-[#1565c0] text-white bg-white/5'
+                : 'border-transparent text-kcg-muted hover:text-kcg-dim hover:bg-white/[0.03]'
+            }`}
+            onClick={() => setActiveTab('spglobal')}
+          >
+            S&P Global
+          </div>
+        )}
+        <div
+          className={`flex-1 py-1.5 text-center cursor-pointer transition-all text-[12px] font-bold tracking-wide border-b-2 ${
+            activeTab === 'marinetraffic'
+              ? 'border-[#1565c0] text-white bg-white/5'
+              : 'border-transparent text-kcg-muted hover:text-kcg-dim hover:bg-white/[0.03]'
+          }`}
+          onClick={() => setActiveTab('marinetraffic')}
+        >
+          MarineTraffic
+        </div>
+      </div>
+
+      <div className="vessel-photo-frame w-full rounded overflow-hidden bg-black/30 relative">
+        {currentUrl ? (
+          <img
+            key={currentUrl}
+            src={currentUrl}
+            alt="Vessel"
+            className="w-full h-full object-contain"
+            onError={() => {
+              if (activeTab === 'spglobal') {
+                setSpgErrors(prev => new Set(prev).add(spgSlideIdx));
+              }
+            }}
+          />
+        ) : noPhoto ? (
+          <div className="flex items-center justify-center h-full text-kcg-dim text-[10px]">
+            No photo available
+          </div>
+        ) : activeTab === 'marinetraffic' && mtPhoto === undefined ? (
+          <div className="flex items-center justify-center h-full text-kcg-dim text-[10px]">
+            Loading...
+          </div>
+        ) : (
+          <div className="flex items-center justify-center h-full text-kcg-dim text-[10px]">
+            No photo available
+          </div>
+        )}
+
+        {activeTab === 'spglobal' && validSpgCount > 1 && (
+          <>
+            <button
+              type="button"
+              className="absolute left-1 top-1/2 -translate-y-1/2 bg-black/50 text-white rounded-full w-6 h-6 flex items-center justify-center text-xs hover:bg-black/70 transition-colors"
+              onClick={(e) => { e.stopPropagation(); setSpgSlideIdx(i => (i - 1 + validSpgCount) % validSpgCount); }}
+            >
+              &lt;
+            </button>
+            <button
+              type="button"
+              className="absolute right-1 top-1/2 -translate-y-1/2 bg-black/50 text-white rounded-full w-6 h-6 flex items-center justify-center text-xs hover:bg-black/70 transition-colors"
+              onClick={(e) => { e.stopPropagation(); setSpgSlideIdx(i => (i + 1) % validSpgCount); }}
+            >
+              &gt;
+            </button>
+            <div className="absolute bottom-1 left-1/2 -translate-x-1/2 flex gap-1">
+              {spgUrls.map((_, i) => (
+                <span
+                  key={i}
+                  className={`w-1.5 h-1.5 rounded-full ${i === spgSlideIdx ? 'bg-white' : 'bg-white/40'}`}
+                />
+              ))}
+            </div>
+          </>
+        )}
+      </div>
+    </div>
+  );
+}
+
+// ── Fleet group type ──────────────────────────────────────────────────────────
+
+interface FleetMember {
+  ship: Ship;
+  role: string;
+  roleKo: string;
+}
+
+interface FleetGroup {
+  members: FleetMember[];
+  fleetTypeKo: string;
+}
+
+// ── Popup content ─────────────────────────────────────────────────────────────
+
+const FLEET_ROLE_COLORS: Record<string, string> = {
+  pair: '#ef4444',
+  carrier: '#f97316',
+  lighting: '#eab308',
+  mothership: '#dc2626',
+  subsidiary: '#6b7280',
+};
+
+interface ShipPopupContentProps {
+  ship: Ship;
+  onClose: () => void;
+  fleetGroup: FleetGroup | null;
+  isDragging: boolean;
+  onMouseDown: (e: React.MouseEvent) => void;
+}
+
+const ShipPopupContent = memo(function ShipPopupContent({
+  ship,
+  onClose,
+  fleetGroup,
+  isDragging: _isDragging,
+  onMouseDown,
+}: ShipPopupContentProps) {
+  const { t } = useTranslation('ships');
+  const mtType = getMTType(ship);
+  const color = MT_TYPE_COLORS[mtType] || MT_TYPE_COLORS.unknown;
+  const isMil = isMilitary(ship.category);
+  const navyLabel = isMil && ship.flag ? t(`navyLabel.${ship.flag}`, { defaultValue: '' }) : undefined;
+  const navyAccent = isMil && ship.flag && NAVY_COLORS[ship.flag] ? NAVY_COLORS[ship.flag] : undefined;
+  const flagEmoji = ship.flag ? FLAG_EMOJI[ship.flag] || '' : '';
+
+  return (
+    <div className="ship-popup-body" onMouseDown={onMouseDown}>
+      {/* Header — draggable handle */}
+      <div
+        className="ship-popup-header"
+        style={{ background: isMil ? '#1a1a2e' : '#1565c0', cursor: 'grab' }}
+      >
+        {flagEmoji && <span className="text-base leading-none">{flagEmoji}</span>}
+        <strong className="ship-popup-name">{ship.name}</strong>
+        {navyLabel && (
+          <span className="ship-popup-navy-badge" style={{ background: navyAccent || color }}>
+            {navyLabel}
+          </span>
+        )}
+        <button
+          type="button"
+          className="ml-auto text-white/60 hover:text-white text-sm leading-none flex items-center justify-center"
+          style={{ minWidth: 28, minHeight: 28, padding: '4px 6px' }}
+          onClick={onClose}
+          onMouseDown={(e) => e.stopPropagation()}
+        >
+          ✕
+        </button>
+      </div>
+
+      {/* Photo */}
+      <VesselPhoto
+        mmsi={ship.mmsi}
+        imo={ship.imo}
+        shipImagePath={ship.shipImagePath}
+        shipImageCount={ship.shipImageCount}
+      />
+
+      {/* Type tags */}
+      <div className="ship-popup-tags">
+        <span className="ship-tag ship-tag-primary" style={{ background: color }}>
+          {t(`mtTypeLabel.${mtType}`, { defaultValue: 'Unknown' })}
+        </span>
+        <span className="ship-tag ship-tag-secondary">
+          {t(`categoryLabel.${ship.category}`)}
+        </span>
+        {ship.typeDesc && (
+          <span className="ship-tag ship-tag-dim">{ship.typeDesc}</span>
+        )}
+      </div>
+
+      {/* Data grid — paired rows */}
+      <div className="ship-popup-grid">
+        <div className="ship-popup-row">
+          <span className="ship-popup-label">MMSI</span>
+          <span className="ship-popup-value">{ship.mmsi}</span>
+        </div>
+        <div className="ship-popup-row">
+          <span className="ship-popup-label">IMO</span>
+          <span className="ship-popup-value">{ship.imo || '-'}</span>
+        </div>
+
+        {ship.callSign && (
+          <>
+            <div className="ship-popup-row">
+              <span className="ship-popup-label">{t('popup.callSign')}</span>
+              <span className="ship-popup-value">{ship.callSign}</span>
+            </div>
+            <div className="ship-popup-row" />
+          </>
+        )}
+
+        <div className="ship-popup-row">
+          <span className="ship-popup-label">Lat</span>
+          <span className="ship-popup-value">{ship.lat.toFixed(4)}</span>
+        </div>
+        <div className="ship-popup-row">
+          <span className="ship-popup-label">Lon</span>
+          <span className="ship-popup-value">{ship.lng.toFixed(4)}</span>
+        </div>
+
+        <div className="ship-popup-row">
+          <span className="ship-popup-label">HDG</span>
+          <span className="ship-popup-value">{ship.heading.toFixed(1)}&deg;</span>
+        </div>
+        <div className="ship-popup-row">
+          <span className="ship-popup-label">COG</span>
+          <span className="ship-popup-value">{ship.course.toFixed(1)}&deg;</span>
+        </div>
+
+        <div className="ship-popup-row">
+          <span className="ship-popup-label">SOG</span>
+          <span className="ship-popup-value">{ship.speed.toFixed(1)} kn</span>
+        </div>
+        <div className="ship-popup-row">
+          <span className="ship-popup-label">Draught</span>
+          <span className="ship-popup-value">{ship.draught ? `${ship.draught.toFixed(2)}m` : '-'}</span>
+        </div>
+
+        <div className="ship-popup-row">
+          <span className="ship-popup-label">Length</span>
+          <span className="ship-popup-value">{ship.length ? `${ship.length}m` : '-'}</span>
+        </div>
+        <div className="ship-popup-row">
+          <span className="ship-popup-label">Width</span>
+          <span className="ship-popup-value">{ship.width ? `${ship.width}m` : '-'}</span>
+        </div>
+      </div>
+
+      {/* Long-value fields */}
+      {ship.status && (
+        <div className="ship-popup-full-row">
+          <span className="ship-popup-label">Status</span>
+          <span className="ship-popup-value">{ship.status}</span>
+        </div>
+      )}
+      {ship.destination && (
+        <div className="ship-popup-full-row">
+          <span className="ship-popup-label">Dest</span>
+          <span className="ship-popup-value">{ship.destination}</span>
+        </div>
+      )}
+      {ship.eta && (
+        <div className="ship-popup-full-row">
+          <span className="ship-popup-label">ETA</span>
+          <span className="ship-popup-value">{new Date(ship.eta).toLocaleString()}</span>
+        </div>
+      )}
+
+      {/* Fleet info */}
+      {fleetGroup && fleetGroup.members.length > 0 && (
+        <div style={{ borderTop: '1px solid #333', marginTop: 6, paddingTop: 6 }}>
+          <div style={{ fontSize: 10, fontWeight: 700, color: '#ef4444', marginBottom: 4 }}>
+            {'\uD83D\uDD17'} {fleetGroup.fleetTypeKo} — {fleetGroup.members.length}척 연결
+          </div>
+          {fleetGroup.members.slice(0, 5).map(m => (
+            <div key={m.ship.mmsi} style={{ fontSize: 9, display: 'flex', gap: 4, padding: '2px 0', color: '#ccc' }}>
+              <span style={{ color: FLEET_ROLE_COLORS[m.role] || '#ef4444', fontWeight: 700, minWidth: 55 }}>
+                {m.roleKo}
+              </span>
+              <span style={{ flex: 1 }}>{m.ship.name || m.ship.mmsi}</span>
+            </div>
+          ))}
+          {fleetGroup.members.length > 5 && (
+            <div style={{ fontSize: 8, color: '#666' }}>...외 {fleetGroup.members.length - 5}척</div>
+          )}
+        </div>
+      )}
+
+      {/* Footer */}
+      <div className="ship-popup-footer">
+        <span className="ship-popup-timestamp">
+          {t('popup.lastUpdate')}: {new Date(ship.lastSeen).toLocaleString()}
+        </span>
+        <a
+          href={`https://www.marinetraffic.com/en/ais/details/ships/mmsi:${ship.mmsi}`}
+          target="_blank"
+          rel="noopener noreferrer"
+          className="ship-popup-link"
+        >
+          MarineTraffic &rarr;
+        </a>
+      </div>
+    </div>
+  );
+});
+
+// ── Position tracking ─────────────────────────────────────────────────────────
+
+interface ScreenPos {
+  x: number;
+  y: number;
+}
+
+// Popup tip/arrow height (CSS triangle pointing downward toward ship)
+const POPUP_TIP_HEIGHT = 10;
+// Vertical offset above ship icon so popup sits above with some gap
+const POPUP_ANCHOR_OFFSET = 16;
+
+// ── Main overlay component ────────────────────────────────────────────────────
+
+export function ShipPopupOverlay() {
+  const { current: mapRef } = useMap();
+
+  const selectedMmsi = useShipDeckStore(s => s.selectedMmsi);
+  const ship = useShipDeckStore(s =>
+    s.selectedMmsi ? s.shipMap.get(s.selectedMmsi) ?? null : null,
+  );
+  const analysisMap = useShipDeckStore(s => s.analysisMap);
+  const ships = useShipDeckStore(s => s.ships);
+
+  // Compute fleet group from analysis map (same logic as ShipLayer lines 414-455)
+  const fleetGroup = useMemo((): FleetGroup | null => {
+    if (!selectedMmsi || !analysisMap) return null;
+    const dto = analysisMap.get(selectedMmsi);
+    if (!dto) return null;
+    const clusterId = dto.algorithms.cluster.clusterId;
+    if (clusterId < 0) return null;
+
+    const members: FleetMember[] = [];
+    for (const [mmsi, d] of analysisMap) {
+      if (d.algorithms.cluster.clusterId !== clusterId) continue;
+      const memberShip = ships.find(s => s.mmsi === mmsi);
+      if (!memberShip) continue;
+      const isLeader = d.algorithms.fleetRole.isLeader;
+      members.push({
+        ship: memberShip,
+        role: d.algorithms.fleetRole.role,
+        roleKo: isLeader ? '본선' : '선단원',
+      });
+    }
+    if (members.length === 0) return null;
+    return { members, fleetTypeKo: '선단' };
+  }, [selectedMmsi, analysisMap, ships]);
+
+  // Screen position of the popup (anchored below ship, updated on map move)
+  const [screenPos, setScreenPos] = useState<ScreenPos | null>(null);
+  // Once dragged, detach from map tracking and use fixed position
+  const [draggedPos, setDraggedPos] = useState<ScreenPos | null>(null);
+
+  const dragging = useRef(false);
+  const dragStartOffset = useRef<ScreenPos>({ x: 0, y: 0 });
+  const popupRef = useRef<HTMLDivElement>(null);
+
+  // Project ship coordinates to screen, accounting for popup height (anchor bottom)
+  const projectShipToScreen = useCallback((): ScreenPos | null => {
+    if (!mapRef || !ship) return null;
+    const m = mapRef.getMap();
+    const point = m.project([ship.lng, ship.lat]);
+    // Anchor bottom: popup tip points down to ship position
+    // We want the tip to be at ship pixel, so offset upward by popup height + tip
+    return { x: point.x, y: point.y };
+  }, [mapRef, ship]);
+
+  // Update anchored position on map move / resize (only if not dragged)
+  useEffect(() => {
+    if (!mapRef || !ship) {
+      setScreenPos(null);
+      return;
+    }
+    if (draggedPos !== null) return; // detached, skip
+
+    const update = () => {
+      setScreenPos(projectShipToScreen());
+    };
+
+    update(); // initial
+    const m = mapRef.getMap();
+    m.on('move', update);
+    m.on('zoom', update);
+    return () => {
+      m.off('move', update);
+      m.off('zoom', update);
+    };
+  }, [mapRef, ship, draggedPos, projectShipToScreen]);
+
+  // Reset drag state when ship changes
+  useEffect(() => {
+    setDraggedPos(null);
+    setScreenPos(projectShipToScreen());
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [selectedMmsi]);
+
+  // Drag handlers
+  const onMouseDown = useCallback((e: React.MouseEvent) => {
+    const target = e.target as HTMLElement;
+    if (!target.closest('.ship-popup-header')) return;
+    e.preventDefault();
+    dragging.current = true;
+    const el = popupRef.current;
+    if (!el) return;
+    const rect = el.getBoundingClientRect();
+    dragStartOffset.current = { x: e.clientX - rect.left, y: e.clientY - rect.top };
+  }, []);
+
+  useEffect(() => {
+    const onMouseMove = (e: MouseEvent) => {
+      if (!dragging.current) return;
+      setDraggedPos({
+        x: e.clientX - dragStartOffset.current.x,
+        y: e.clientY - dragStartOffset.current.y,
+      });
+    };
+    const onMouseUp = () => { dragging.current = false; };
+    document.addEventListener('mousemove', onMouseMove);
+    document.addEventListener('mouseup', onMouseUp);
+    return () => {
+      document.removeEventListener('mousemove', onMouseMove);
+      document.removeEventListener('mouseup', onMouseUp);
+    };
+  }, []);
+
+  const handleClose = useCallback(() => {
+    useShipDeckStore.getState().setSelectedMmsi(null);
+  }, []);
+
+  if (!ship) return null;
+
+  // Determine final CSS position
+  // draggedPos: user dragged → use fixed left/top directly (popup div is positioned inside map container)
+  // screenPos: anchored to ship → offset upward so tip touches ship
+  let style: React.CSSProperties;
+  if (draggedPos !== null) {
+    style = {
+      position: 'absolute',
+      left: draggedPos.x,
+      top: draggedPos.y,
+      transform: 'none',
+    };
+  } else if (screenPos !== null) {
+    // Offset: translate(-50%, -100%) then subtract tip height + anchor gap
+    // We use transform for centering horizontally and anchoring at bottom
+    style = {
+      position: 'absolute',
+      left: screenPos.x,
+      top: screenPos.y - POPUP_ANCHOR_OFFSET - POPUP_TIP_HEIGHT,
+      transform: 'translateX(-50%) translateY(-100%)',
+    };
+  } else {
+    return null;
+  }
+
+  return (
+    <div
+      ref={popupRef}
+      className="z-50 select-none rounded-lg shadow-lg overflow-hidden"
+      style={{ ...style, background: '#1a1a2e', border: '1px solid rgba(255,255,255,0.15)' }}
+    >
+      {/* Popup body */}
+      <ShipPopupContent
+        ship={ship}
+        onClose={handleClose}
+        fleetGroup={fleetGroup}
+        isDragging={dragging.current}
+        onMouseDown={onMouseDown}
+      />
+      {/* CSS triangle arrow pointing down toward ship (only when anchored) */}
+      {draggedPos === null && (
+        <div
+          style={{
+            position: 'absolute',
+            bottom: -POPUP_TIP_HEIGHT,
+            left: '50%',
+            transform: 'translateX(-50%)',
+            width: 0,
+            height: 0,
+            borderLeft: '8px solid transparent',
+            borderRight: '8px solid transparent',
+            borderTop: `${POPUP_TIP_HEIGHT}px solid rgba(10, 10, 26, 0.96)`,
+            pointerEvents: 'none',
+          }}
+        />
+      )}
+    </div>
+  );
+}
+
+// ── Ship Hover Tooltip ───────────────────────────────────────────────────────
+
+export function ShipHoverTooltip() {
+  const hoveredMmsi = useShipDeckStore(s => s.hoveredMmsi);
+  const hoverScreenPos = useShipDeckStore(s => s.hoverScreenPos);
+  const ship = useShipDeckStore(s => s.hoveredMmsi ? s.shipMap.get(s.hoveredMmsi) ?? null : null);
+  const selectedMmsi = useShipDeckStore(s => s.selectedMmsi);
+
+  // 팝업이 열려있으면 툴팁 숨김
+  if (!hoveredMmsi || !hoverScreenPos || !ship || selectedMmsi === hoveredMmsi) return null;
+
+  const lastSeen = ship.lastSeen
+    ? new Date(ship.lastSeen).toLocaleString('ko-KR', { hour: '2-digit', minute: '2-digit', second: '2-digit' })
+    : '-';
+
+  return (
+    <div
+      className="pointer-events-none z-40"
+      style={{
+        position: 'absolute',
+        left: hoverScreenPos.x + 14,
+        top: hoverScreenPos.y - 10,
+      }}
+    >
+      <div
+        className="rounded px-2.5 py-1.5 font-mono text-[10px] leading-relaxed whitespace-nowrap shadow-lg"
+        style={{ background: '#1a1a2e', border: '1px solid rgba(255,255,255,0.15)' }}
+      >
+        <div className="text-[11px] font-bold text-white/90 mb-0.5">
+          {ship.name || 'Unknown'}
+        </div>
+        <div className="text-white/50">MMSI {ship.mmsi}</div>
+        <div className="text-white/50">
+          {ship.lat.toFixed(4)}, {ship.lng.toFixed(4)}
+        </div>
+        <div className="text-white/50">
+          {ship.speed?.toFixed(1) ?? '-'} kn / {ship.heading?.toFixed(0) ?? '-'}&deg;
+        </div>
+        <div className="text-white/40">{lastSeen}</div>
+      </div>
+    </div>
+  );
+}

frontend/src/hooks/useFleetClusterDeckLayers.ts

@@ -0,0 +1,552 @@
+import { useMemo } from 'react';
+import type { Layer } from '@deck.gl/core';
+import { GeoJsonLayer, IconLayer, ScatterplotLayer, TextLayer } from '@deck.gl/layers';
+import { SHIP_ICON_MAPPING } from '../utils/shipIconSvg';
+import { MODEL_ORDER, MODEL_COLORS } from '../components/korea/fleetClusterConstants';
+import type { FleetClusterGeoJsonResult } from '../components/korea/useFleetClusterGeoJson';
+import { FONT_MONO } from '../styles/fonts';
+import { clusterLabels } from '../utils/labelCluster';
+
+// ── Config ────────────────────────────────────────────────────────────────────
+
+export interface FleetClusterDeckConfig {
+  selectedGearGroup: string | null;
+  hoveredMmsi: string | null;
+  hoveredGearGroup: string | null; // gear polygon hover highlight
+  enabledModels: Set<string>;
+  historyActive: boolean;
+  hasCorrelationTracks: boolean;
+  zoomScale: number;
+  zoomLevel: number;   // integer zoom for label clustering
+  fontScale?: number;  // fontScale.analysis (default 1)
+  focusMode?: boolean; // 집중 모드 — 라이브 폴리곤/마커 숨김
+  onPolygonClick?: (features: PickedPolygonFeature[], coordinate: [number, number]) => void;
+  onPolygonHover?: (info: { lng: number; lat: number; type: 'fleet' | 'gear'; id: string | number } | null) => void;
+}
+
+export interface PickedPolygonFeature {
+  type: 'fleet' | 'gear';
+  clusterId?: number;
+  name?: string;
+  gearCount?: number;
+  inZone?: boolean;
+}
+
+// ── Hex → RGBA (module-level cache) ──────────────────────────────────────────
+
+const hexRgbaCache = new Map<string, [number, number, number, number]>();
+
+function hexToRgba(hex: string, alpha = 255): [number, number, number, number] {
+  const cacheKey = `${hex}-${alpha}`;
+  const cached = hexRgbaCache.get(cacheKey);
+  if (cached) return cached;
+  const h = hex.replace('#', '');
+  let r = parseInt(h.substring(0, 2), 16) || 0;
+  let g = parseInt(h.substring(2, 4), 16) || 0;
+  let b = parseInt(h.substring(4, 6), 16) || 0;
+  // 어두운 색상 밝기 보정 (바다 배경 대비)
+  const lum = (0.299 * r + 0.587 * g + 0.114 * b) / 255;
+  if (lum < 0.3) {
+    const boost = 0.3 / Math.max(lum, 0.01);
+    r = Math.min(255, Math.round(r * boost));
+    g = Math.min(255, Math.round(g * boost));
+    b = Math.min(255, Math.round(b * boost));
+  }
+  const rgba: [number, number, number, number] = [r, g, b, alpha];
+  hexRgbaCache.set(cacheKey, rgba);
+  return rgba;
+}
+
+// ── Gear cluster color helpers ────────────────────────────────────────────────
+
+const GEAR_IN_ZONE_FILL: [number, number, number, number] = [220, 38, 38, 25];    // #dc2626 opacity 0.10
+const GEAR_IN_ZONE_LINE: [number, number, number, number] = [220, 38, 38, 200];   // #dc2626
+const GEAR_OUT_ZONE_FILL: [number, number, number, number] = [249, 115, 22, 25];  // #f97316 opacity 0.10
+const GEAR_OUT_ZONE_LINE: [number, number, number, number] = [249, 115, 22, 200]; // #f97316
+
+const ICON_PX = 64;
+
+// ── Point-in-polygon (ray casting) ──────────────────────────────────────────
+
+function pointInRing(point: [number, number], ring: number[][]): boolean {
+  const [px, py] = point;
+  let inside = false;
+  for (let i = 0, j = ring.length - 1; i < ring.length; j = i++) {
+    const xi = ring[i][0], yi = ring[i][1];
+    const xj = ring[j][0], yj = ring[j][1];
+    if ((yi > py) !== (yj > py) && px < (xj - xi) * (py - yi) / (yj - yi) + xi) {
+      inside = !inside;
+    }
+  }
+  return inside;
+}
+
+function pointInPolygon(point: [number, number], geometry: GeoJSON.Geometry): boolean {
+  if (geometry.type === 'Polygon') {
+    return pointInRing(point, geometry.coordinates[0]);
+  }
+  if (geometry.type === 'MultiPolygon') {
+    return geometry.coordinates.some(poly => pointInRing(point, poly[0]));
+  }
+  return false;
+}
+
+/** Find all fleet/gear polygons at a given coordinate */
+function findPolygonsAtPoint(
+  point: [number, number],
+  fleetFc: GeoJSON.FeatureCollection,
+  gearFc: GeoJSON.FeatureCollection,
+): PickedPolygonFeature[] {
+  const results: PickedPolygonFeature[] = [];
+  for (const f of fleetFc.features) {
+    if (pointInPolygon(point, f.geometry)) {
+      results.push({
+        type: 'fleet',
+        clusterId: f.properties?.clusterId,
+        name: f.properties?.name,
+      });
+    }
+  }
+  for (const f of gearFc.features) {
+    if (pointInPolygon(point, f.geometry)) {
+      results.push({
+        type: 'gear',
+        name: f.properties?.name,
+        gearCount: f.properties?.gearCount,
+        inZone: f.properties?.inZone === 1,
+      });
+    }
+  }
+  return results;
+}
+
+// ── Hook ──────────────────────────────────────────────────────────────────────
+
+/**
+ * Converts FleetClusterGeoJsonResult (produced by useFleetClusterGeoJson) into
+ * deck.gl Layer instances.
+ *
+ * Uses useMemo — fleet data changes infrequently (every 5 minutes) and on user
+ * interaction (hover, select). No Zustand subscribe pattern needed.
+ */
+export function useFleetClusterDeckLayers(
+  geo: FleetClusterGeoJsonResult | null,
+  config: FleetClusterDeckConfig,
+): Layer[] {
+  const {
+    selectedGearGroup,
+    hoveredMmsi,
+    hoveredGearGroup,
+    enabledModels,
+    historyActive,
+    zoomScale,
+    zoomLevel,
+    fontScale: fs = 1,
+    onPolygonClick,
+    onPolygonHover,
+  } = config;
+
+  const focusMode = config.focusMode ?? false;
+
+  return useMemo((): Layer[] => {
+    if (!geo || focusMode) return [];
+
+    const layers: Layer[] = [];
+
+    // ── 1. Fleet polygons (fleetPolygonGeoJSON) ──────────────────────────────
+    const fleetPoly = geo.fleetPolygonGeoJSON as GeoJSON.FeatureCollection;
+    if (fleetPoly.features.length > 0) {
+      layers.push(new GeoJsonLayer({
+        id: 'fleet-polygons',
+        data: fleetPoly,
+        getFillColor: (f: GeoJSON.Feature) =>
+          hexToRgba(f.properties?.color ?? '#63b3ed', 25),
+        getLineColor: (f: GeoJSON.Feature) =>
+          hexToRgba(f.properties?.color ?? '#63b3ed', 128),
+        getLineWidth: 1.5,
+        lineWidthUnits: 'pixels',
+        filled: true,
+        stroked: true,
+        pickable: true,
+        onHover: (info) => {
+          if (info.object) {
+            const f = info.object as GeoJSON.Feature;
+            const cid = f.properties?.clusterId;
+            if (cid != null) {
+              onPolygonHover?.({ lng: info.coordinate![0], lat: info.coordinate![1], type: 'fleet', id: cid });
+            }
+          } else {
+            onPolygonHover?.(null);
+          }
+        },
+        onClick: (info) => {
+          if (!info.object || !info.coordinate || !onPolygonClick) return;
+          const pt: [number, number] = [info.coordinate[0], info.coordinate[1]];
+          onPolygonClick(findPolygonsAtPoint(pt, fleetPoly, gearFc), pt);
+        },
+        updateTriggers: {},
+      }));
+    }
+
+    // ── 2. Hovered fleet highlight (hoveredGeoJSON) ──────────────────────────
+    const hoveredPoly = geo.hoveredGeoJSON as GeoJSON.FeatureCollection;
+    if (hoveredPoly.features.length > 0) {
+      layers.push(new GeoJsonLayer({
+        id: 'fleet-hover-highlight',
+        data: hoveredPoly,
+        getFillColor: (f: GeoJSON.Feature) =>
+          hexToRgba(f.properties?.color ?? '#63b3ed', 64),
+        getLineColor: (f: GeoJSON.Feature) =>
+          hexToRgba(f.properties?.color ?? '#63b3ed', 200),
+        getLineWidth: 2,
+        lineWidthUnits: 'pixels',
+        filled: true,
+        stroked: true,
+        pickable: false,
+      }));
+    }
+
+    // ── 3. Fleet 2-ship lines (lineGeoJSON) ──────────────────────────────────
+    // Currently always empty (server handles 2-ship fleets as Polygon), kept for future
+    const lineFc = geo.lineGeoJSON as GeoJSON.FeatureCollection;
+    if (lineFc.features.length > 0) {
+      layers.push(new GeoJsonLayer({
+        id: 'fleet-lines',
+        data: lineFc,
+        getLineColor: (f: GeoJSON.Feature) =>
+          hexToRgba(f.properties?.color ?? '#63b3ed', 180),
+        getLineWidth: 1.5,
+        lineWidthUnits: 'pixels',
+        filled: false,
+        stroked: true,
+        pickable: false,
+      }));
+    }
+
+    // ── 4. Gear cluster polygons (gearClusterGeoJson) ────────────────────────
+    const gearFc = geo.gearClusterGeoJson as GeoJSON.FeatureCollection;
+    if (gearFc.features.length > 0) {
+      layers.push(new GeoJsonLayer({
+        id: 'gear-cluster-polygons',
+        data: gearFc,
+        getFillColor: (f: GeoJSON.Feature) =>
+          f.properties?.inZone === 1 ? GEAR_IN_ZONE_FILL : GEAR_OUT_ZONE_FILL,
+        getLineColor: (f: GeoJSON.Feature) =>
+          f.properties?.inZone === 1 ? GEAR_IN_ZONE_LINE : GEAR_OUT_ZONE_LINE,
+        getLineWidth: 1.5,
+        lineWidthUnits: 'pixels',
+        filled: true,
+        stroked: true,
+        pickable: true,
+        onHover: (info) => {
+          if (info.object) {
+            const f = info.object as GeoJSON.Feature;
+            const name = f.properties?.name;
+            if (name) {
+              onPolygonHover?.({ lng: info.coordinate![0], lat: info.coordinate![1], type: 'gear', id: name });
+            }
+          } else {
+            onPolygonHover?.(null);
+          }
+        },
+        onClick: (info) => {
+          if (!info.object || !info.coordinate || !onPolygonClick) return;
+          const pt: [number, number] = [info.coordinate[0], info.coordinate[1]];
+          onPolygonClick(findPolygonsAtPoint(pt, fleetPoly, gearFc), pt);
+        },
+      }));
+    }
+
+    // ── 4b. Gear hover highlight ──────────────────────────────────────────
+    if (hoveredGearGroup && gearFc.features.length > 0) {
+      const hoveredGearFeatures = gearFc.features.filter(
+        f => f.properties?.name === hoveredGearGroup,
+      );
+      if (hoveredGearFeatures.length > 0) {
+        layers.push(new GeoJsonLayer({
+          id: 'gear-hover-highlight',
+          data: { type: 'FeatureCollection' as const, features: hoveredGearFeatures },
+          getFillColor: (f: GeoJSON.Feature) =>
+            f.properties?.inZone === 1 ? [220, 38, 38, 64] : [249, 115, 22, 64],
+          getLineColor: (f: GeoJSON.Feature) =>
+            f.properties?.inZone === 1 ? [220, 38, 38, 255] : [249, 115, 22, 255],
+          getLineWidth: 2.5,
+          lineWidthUnits: 'pixels',
+          filled: true,
+          stroked: true,
+          pickable: false,
+        }));
+      }
+    }
+
+    // ── 5. Selected gear highlight (selectedGearHighlightGeoJson) ────────────
+    if (geo.selectedGearHighlightGeoJson && geo.selectedGearHighlightGeoJson.features.length > 0) {
+      layers.push(new GeoJsonLayer({
+        id: 'gear-selected-highlight',
+        data: geo.selectedGearHighlightGeoJson,
+        getFillColor: [249, 115, 22, 40],
+        getLineColor: [249, 115, 22, 230],
+        getLineWidth: 2,
+        lineWidthUnits: 'pixels',
+        filled: true,
+        stroked: true,
+        pickable: false,
+      }));
+    }
+
+    // ── 6. Member markers (memberMarkersGeoJson) — skip when historyActive ───
+    if (!historyActive) {
+      const memberFc = geo.memberMarkersGeoJson as GeoJSON.FeatureCollection;
+      if (memberFc.features.length > 0) {
+        layers.push(new IconLayer<GeoJSON.Feature>({
+          id: 'fleet-member-icons',
+          data: memberFc.features,
+          getPosition: (f: GeoJSON.Feature) =>
+            (f.geometry as GeoJSON.Point).coordinates as [number, number],
+          getIcon: (f: GeoJSON.Feature) =>
+            f.properties?.isGear === 1
+              ? SHIP_ICON_MAPPING['gear-diamond']
+              : SHIP_ICON_MAPPING['ship-triangle'],
+          getSize: (f: GeoJSON.Feature) =>
+            (f.properties?.baseSize ?? 0.14) * zoomScale * ICON_PX,
+          getAngle: (f: GeoJSON.Feature) =>
+            f.properties?.isGear === 1 ? 0 : -(f.properties?.cog ?? 0),
+          getColor: (f: GeoJSON.Feature) =>
+            hexToRgba(f.properties?.color ?? '#9e9e9e'),
+          sizeUnits: 'pixels',
+          sizeMinPixels: 3,
+          billboard: false,
+          pickable: false,
+          updateTriggers: {
+            getSize: [zoomScale, fs],
+          },
+        }));
+
+        const clusteredMembers = clusterLabels(
+          memberFc.features,
+          f => (f.geometry as GeoJSON.Point).coordinates as [number, number],
+          zoomLevel,
+        );
+        layers.push(new TextLayer<GeoJSON.Feature>({
+          id: 'fleet-member-labels',
+          data: clusteredMembers,
+          getPosition: (f: GeoJSON.Feature) =>
+            (f.geometry as GeoJSON.Point).coordinates as [number, number],
+          getText: (f: GeoJSON.Feature) => {
+            const isParent = f.properties?.isParent === 1;
+            return isParent ? `\u2605 ${f.properties?.name ?? ''}` : (f.properties?.name ?? '');
+          },
+          getSize: 8 * zoomScale * fs,
+          getColor: (f: GeoJSON.Feature) =>
+            hexToRgba(f.properties?.color ?? '#e2e8f0'),
+          getTextAnchor: 'middle',
+          getAlignmentBaseline: 'top',
+          getPixelOffset: [0, 10],
+          fontFamily: FONT_MONO,
+          background: true,
+          getBackgroundColor: [0, 0, 0, 200],
+          backgroundPadding: [3, 1],
+          billboard: false,
+          characterSet: 'auto',
+          updateTriggers: {
+            getSize: [zoomScale, fs],
+          },
+        }));
+      }
+    }
+
+    // ── 7. Picker highlight (pickerHighlightGeoJson) ──────────────────────────
+    const pickerFc = geo.pickerHighlightGeoJson as GeoJSON.FeatureCollection;
+    if (pickerFc.features.length > 0) {
+      layers.push(new GeoJsonLayer({
+        id: 'fleet-picker-highlight',
+        data: pickerFc,
+        getFillColor: [255, 255, 255, 25],
+        getLineColor: [255, 255, 255, 200],
+        getLineWidth: 2,
+        lineWidthUnits: 'pixels',
+        filled: true,
+        stroked: true,
+        pickable: false,
+      }));
+    }
+
+    // ── Correlation layers (only when gear group selected) ────────────────────
+    if (selectedGearGroup) {
+
+      // ── 8. Operational polygons (per model) ────────────────────────────────
+      for (const op of geo.operationalPolygons) {
+        if (!enabledModels.has(op.modelName)) continue;
+        if (op.geojson.features.length === 0) continue;
+        const modelColor = MODEL_COLORS[op.modelName] ?? '#94a3b8';
+        layers.push(new GeoJsonLayer({
+          id: `fleet-op-polygon-${op.modelName}`,
+          data: op.geojson,
+          getFillColor: hexToRgba(modelColor, 30),
+          getLineColor: hexToRgba(modelColor, 180),
+          getLineWidth: 1.5,
+          lineWidthUnits: 'pixels',
+          filled: true,
+          stroked: true,
+          pickable: false,
+        }));
+      }
+
+      // ── 9. Correlation trails (correlationTrailGeoJson) ────────────────────
+      const trailFc = geo.correlationTrailGeoJson as GeoJSON.FeatureCollection;
+      if (trailFc.features.length > 0) {
+        layers.push(new GeoJsonLayer({
+          id: 'fleet-correlation-trails',
+          data: trailFc,
+          getLineColor: (f: GeoJSON.Feature) =>
+            hexToRgba(f.properties?.color ?? '#60a5fa', 160),
+          getLineWidth: 1.5,
+          lineWidthUnits: 'pixels',
+          filled: false,
+          stroked: true,
+          pickable: false,
+        }));
+      }
+
+      // ── 10. Correlation vessels (correlationVesselGeoJson) ─────────────────
+      const corrVesselFc = geo.correlationVesselGeoJson as GeoJSON.FeatureCollection;
+      if (corrVesselFc.features.length > 0) {
+        layers.push(new IconLayer<GeoJSON.Feature>({
+          id: 'fleet-correlation-vessel-icons',
+          data: corrVesselFc.features,
+          getPosition: (f: GeoJSON.Feature) =>
+            (f.geometry as GeoJSON.Point).coordinates as [number, number],
+          getIcon: () => SHIP_ICON_MAPPING['ship-triangle'],
+          getSize: () =>
+            0.14 * zoomScale * ICON_PX,
+          getAngle: (f: GeoJSON.Feature) => -(f.properties?.cog ?? 0),
+          getColor: (f: GeoJSON.Feature) =>
+            hexToRgba(f.properties?.color ?? '#60a5fa'),
+          sizeUnits: 'pixels',
+          sizeMinPixels: 3,
+          billboard: false,
+          pickable: false,
+          updateTriggers: {
+            getSize: [zoomScale, fs],
+          },
+        }));
+
+        const clusteredCorr = clusterLabels(
+          corrVesselFc.features,
+          f => (f.geometry as GeoJSON.Point).coordinates as [number, number],
+          zoomLevel,
+        );
+        layers.push(new TextLayer<GeoJSON.Feature>({
+          id: 'fleet-correlation-vessel-labels',
+          data: clusteredCorr,
+          getPosition: (f: GeoJSON.Feature) =>
+            (f.geometry as GeoJSON.Point).coordinates as [number, number],
+          getText: (f: GeoJSON.Feature) => f.properties?.name ?? '',
+          getSize: 8 * zoomScale * fs,
+          getColor: (f: GeoJSON.Feature) =>
+            hexToRgba(f.properties?.color ?? '#60a5fa'),
+          getTextAnchor: 'middle',
+          getAlignmentBaseline: 'top',
+          getPixelOffset: [0, 10],
+          fontFamily: FONT_MONO,
+          background: true,
+          getBackgroundColor: [0, 0, 0, 200],
+          backgroundPadding: [3, 1],
+          billboard: false,
+          characterSet: 'auto',
+          updateTriggers: {
+            getSize: [zoomScale, fs],
+          },
+        }));
+      }
+
+      // ── 11. Model badges (modelBadgesGeoJson) ─────────────────────────────
+      // Rendered as small ScatterplotLayer dots, one layer per active model.
+      // Position is offset in world coordinates (small lng offset per model index).
+      // Badge size is intentionally small (4px) as visual indicators only.
+      const badgeFc = geo.modelBadgesGeoJson as GeoJSON.FeatureCollection;
+      if (badgeFc.features.length > 0) {
+        MODEL_ORDER.forEach((modelName, i) => {
+          if (!enabledModels.has(modelName)) return;
+          const modelColor = MODEL_COLORS[modelName] ?? '#94a3b8';
+          const activeFeatures = badgeFc.features.filter(
+            (f) => f.properties?.[`m${i}`] === 1,
+          );
+          if (activeFeatures.length === 0) return;
+
+          // Small lng offset per model index to avoid overlap (≈ 300m at z10)
+          const lngOffset = i * 0.003;
+
+          layers.push(new ScatterplotLayer<GeoJSON.Feature>({
+            id: `fleet-model-badge-${modelName}`,
+            data: activeFeatures,
+            getPosition: (f: GeoJSON.Feature) => {
+              const [lng, lat] = (f.geometry as GeoJSON.Point).coordinates;
+              return [lng + lngOffset, lat] as [number, number];
+            },
+            getRadius: 4,
+            getFillColor: hexToRgba(modelColor, 230),
+            getLineColor: [0, 0, 0, 200],
+            getLineWidth: 1,
+            stroked: true,
+            filled: true,
+            radiusUnits: 'pixels',
+            lineWidthUnits: 'pixels',
+            pickable: false,
+          }));
+        });
+      }
+
+      // ── 12. Hover highlight (hoverHighlightGeoJson + trail) ───────────────
+      if (hoveredMmsi) {
+        const hoverFc = geo.hoverHighlightGeoJson as GeoJSON.FeatureCollection;
+        if (hoverFc.features.length > 0) {
+          layers.push(new ScatterplotLayer<GeoJSON.Feature>({
+            id: 'fleet-hover-ring',
+            data: hoverFc.features,
+            getPosition: (f: GeoJSON.Feature) =>
+              (f.geometry as GeoJSON.Point).coordinates as [number, number],
+            getRadius: 18,
+            getFillColor: [255, 255, 255, 20],
+            getLineColor: [255, 255, 255, 200],
+            getLineWidth: 2,
+            stroked: true,
+            filled: true,
+            radiusUnits: 'pixels',
+            lineWidthUnits: 'pixels',
+            pickable: false,
+          }));
+        }
+
+        const hoverTrailFc = geo.hoverHighlightTrailGeoJson as GeoJSON.FeatureCollection;
+        if (hoverTrailFc.features.length > 0) {
+          layers.push(new GeoJsonLayer({
+            id: 'fleet-hover-trail',
+            data: hoverTrailFc,
+            getLineColor: [255, 255, 255, 150],
+            getLineWidth: 1.5,
+            lineWidthUnits: 'pixels',
+            filled: false,
+            stroked: true,
+            pickable: false,
+          }));
+        }
+      }
+    }
+
+    return layers;
+  }, [
+    geo,
+    selectedGearGroup,
+    hoveredMmsi,
+    hoveredGearGroup,
+    enabledModels,
+    historyActive,
+    zoomScale,
+    zoomLevel,
+    fs,
+    focusMode,
+    onPolygonClick,
+    onPolygonHover,
+  ]);
+}

frontend/src/hooks/useGearReplayLayers.ts

@@ -9,6 +9,9 @@ import { MODEL_ORDER, MODEL_COLORS } from '../components/korea/fleetClusterConst
 import { buildInterpPolygon } from '../components/korea/fleetClusterUtils';
 import type { GearCorrelationItem } from '../services/vesselAnalysis';
 import { SHIP_ICON_MAPPING } from '../utils/shipIconSvg';
+import { useFontScale } from './useFontScale';
+import { useShipDeckStore } from '../stores/shipDeckStore';
+import { clusterLabels } from '../utils/labelCluster';
 
 // ── Constants ─────────────────────────────────────────────────────────────────
 
@@ -60,6 +63,7 @@ export function useGearReplayLayers(
   const correlationTripsData = useGearReplayStore(s => s.correlationTripsData);
   const centerTrailSegments = useGearReplayStore(s => s.centerTrailSegments);
   const centerDotsPositions = useGearReplayStore(s => s.centerDotsPositions);
+  const subClusterCenters = useGearReplayStore(s => s.subClusterCenters);
   const enabledModels = useGearReplayStore(s => s.enabledModels);
   const enabledVessels = useGearReplayStore(s => s.enabledVessels);
   const hoveredMmsi = useGearReplayStore(s => s.hoveredMmsi);
@@ -67,6 +71,9 @@ export function useGearReplayLayers(
   const modelCenterTrails = useGearReplayStore(s => s.modelCenterTrails);
   const showTrails = useGearReplayStore(s => s.showTrails);
   const showLabels = useGearReplayStore(s => s.showLabels);
+  const { fontScale } = useFontScale();
+  const fs = fontScale.analysis;
+  const zoomLevel = useShipDeckStore(s => s.zoomLevel);
 
   // ── Refs ─────────────────────────────────────────────────────────────────
   const cursorRef = useRef(0);   // frame cursor for O(1) forward lookup
@@ -126,6 +133,26 @@ export function useGearReplayLayers(
       }));
     }
 
+    // ── 서브클러스터별 독립 center trail (PathLayer) ─────────────────────
+    const SUB_COLORS: [number, number, number, number][] = [
+      [251, 191, 36, 200],   // sub=0 (unified) — 기존 gold
+      [96, 165, 250, 200],   // sub=1 — blue
+      [74, 222, 128, 200],   // sub=2 — green
+      [251, 146, 60, 200],   // sub=3 — orange
+      [167, 139, 250, 200],  // sub=4 — purple
+    ];
+    for (const sc of subClusterCenters) {
+      if (sc.path.length < 2) continue;
+      const color = SUB_COLORS[sc.subClusterId % SUB_COLORS.length];
+      layers.push(new PathLayer({
+        id: `replay-sub-center-${sc.subClusterId}`,
+        data: [{ path: sc.path }],
+        getPath: (d: { path: [number, number][] }) => d.path,
+        getColor: color,
+        widthMinPixels: 2,
+      }));
+    }
+
     // ── Dynamic layers (depend on currentTime) ────────────────────────────
 
     if (frameIdx < 0) {
@@ -224,24 +251,30 @@ export function useGearReplayLayers(
         billboard: false,
       }));
 
-      // Member labels — showLabels 제어
-      if (showLabels) layers.push(new TextLayer<MemberPosition>({
+      // Member labels — showLabels 제어 + 줌 레벨별 클러스터
+      if (showLabels) {
+        const clusteredMembers = clusterLabels(members, d => [d.lon, d.lat], zoomLevel);
+        layers.push(new TextLayer<MemberPosition>({
         id: 'replay-member-labels',
-        data: members,
+        data: clusteredMembers,
         getPosition: d => [d.lon, d.lat],
-        getText: d => d.name || d.mmsi,
+        getText: d => {
+          const prefix = d.isParent ? '\u2605 ' : '';
+          return prefix + (d.name || d.mmsi);
+        },
         getColor: d => d.stale
           ? [148, 163, 184, 200]
           : d.isGear
             ? [226, 232, 240, 255]
             : [251, 191, 36, 255],
-        getSize: 10,
+        getSize: 10 * fs,
         getPixelOffset: [0, 14],
         background: true,
         getBackgroundColor: [0, 0, 0, 200],
         backgroundPadding: [2, 1],
         fontFamily: '"Fira Code Variable", monospace',
       }));
+      }
     }
 
     // 6. Correlation vessel positions (트랙 보간 → 끝점 clamp → live fallback)
@@ -368,18 +401,21 @@ export function useGearReplayLayers(
         billboard: false,
       }));
 
-      if (showLabels) layers.push(new TextLayer<CorrPosition>({
+      if (showLabels) {
+        const clusteredCorr = clusterLabels(corrPositions, d => [d.lon, d.lat], zoomLevel);
+        layers.push(new TextLayer<CorrPosition>({
         id: 'replay-corr-labels',
-        data: corrPositions,
+        data: clusteredCorr,
         getPosition: d => [d.lon, d.lat],
         getText: d => d.name,
         getColor: d => d.color,
-        getSize: 8,
+        getSize: 8 * fs,
         getPixelOffset: [0, 15],
         background: true,
         getBackgroundColor: [0, 0, 0, 200],
         backgroundPadding: [2, 1],
       }));
+      }
     }
 
     // 7. Hover highlight
@@ -517,7 +553,7 @@ export function useGearReplayLayers(
             getPosition: (d: { position: [number, number] }) => d.position,
             getText: () => trail.modelName,
             getColor: [r, g, b, 255],
-            getSize: 9,
+            getSize: 9 * fs,
             getPixelOffset: [0, -12],
             background: true,
             getBackgroundColor: [0, 0, 0, 200],
@@ -630,7 +666,7 @@ export function useGearReplayLayers(
     historyFrames, memberTripsData, correlationTripsData,
     centerTrailSegments, centerDotsPositions,
     enabledModels, enabledVessels, hoveredMmsi, correlationByModel,
-    modelCenterTrails, showTrails, showLabels,
+    modelCenterTrails, subClusterCenters, showTrails, showLabels, fs, zoomLevel,
     replayLayerRef, requestRender,
   ]);
 
@@ -649,7 +685,12 @@ export function useGearReplayLayers(
   // ── zustand.subscribe effect (currentTime → renderFrame) ─────────────────
 
   useEffect(() => {
-    if (historyFrames.length === 0) return;
+    if (historyFrames.length === 0) {
+      // Reset 시 레이어 클리어
+      replayLayerRef.current = [];
+      requestRender();
+      return;
+    }
 
     // Initial render
     renderFrame();

frontend/src/hooks/useGroupPolygons.ts

@@ -4,6 +4,33 @@ import type { GroupPolygonDto } from '../services/vesselAnalysis';
 
 const POLL_INTERVAL_MS = 5 * 60_000; // 5분
 
+/** 같은 groupKey의 서브클러스터를 하나로 합산 (멤버 합산, 가장 큰 폴리곤 사용) */
+function mergeByGroupKey(groups: GroupPolygonDto[]): GroupPolygonDto[] {
+  const byKey = new Map<string, GroupPolygonDto[]>();
+  for (const g of groups) {
+    const list = byKey.get(g.groupKey) ?? [];
+    list.push(g);
+    byKey.set(g.groupKey, list);
+  }
+  const result: GroupPolygonDto[] = [];
+  for (const [, items] of byKey) {
+    if (items.length === 1) { result.push(items[0]); continue; }
+    const seen = new Set<string>();
+    const allMembers: GroupPolygonDto['members'] = [];
+    for (const item of items) for (const m of item.members) {
+      if (!seen.has(m.mmsi)) { seen.add(m.mmsi); allMembers.push(m); }
+    }
+    const biggest = items.reduce((a, b) => a.memberCount >= b.memberCount ? a : b);
+    result.push({
+      ...biggest,
+      subClusterId: 0,
+      members: allMembers,
+      memberCount: allMembers.length,
+    });
+  }
+  return result;
+}
+
 export interface UseGroupPolygonsResult {
   fleetGroups: GroupPolygonDto[];
   gearInZoneGroups: GroupPolygonDto[];
@@ -49,17 +76,17 @@ export function useGroupPolygons(enabled: boolean): UseGroupPolygonsResult {
   }, [enabled, load]);
 
   const fleetGroups = useMemo(
-    () => allGroups.filter(g => g.groupType === 'FLEET'),
+    () => mergeByGroupKey(allGroups.filter(g => g.groupType === 'FLEET')),
     [allGroups],
   );
 
   const gearInZoneGroups = useMemo(
-    () => allGroups.filter(g => g.groupType === 'GEAR_IN_ZONE'),
+    () => mergeByGroupKey(allGroups.filter(g => g.groupType === 'GEAR_IN_ZONE')),
     [allGroups],
   );
 
   const gearOutZoneGroups = useMemo(
-    () => allGroups.filter(g => g.groupType === 'GEAR_OUT_ZONE'),
+    () => mergeByGroupKey(allGroups.filter(g => g.groupType === 'GEAR_OUT_ZONE')),
     [allGroups],
   );
 

frontend/src/hooks/useShipDeckLayers.ts

@@ -0,0 +1,349 @@
+import { useEffect, useCallback } from 'react';
+import type { Layer } from '@deck.gl/core';
+import { IconLayer, ScatterplotLayer, TextLayer } from '@deck.gl/layers';
+import { useShipDeckStore } from '../stores/shipDeckStore';
+import { useGearReplayStore } from '../stores/gearReplayStore';
+import { SHIP_ICON_MAPPING } from '../utils/shipIconSvg';
+import { MT_TYPE_HEX, getMTType, SIZE_MAP, isMilitary } from '../utils/shipClassification';
+import { getMarineTrafficCategory } from '../utils/marineTraffic';
+import { getNationalityGroup } from './useKoreaData';
+import { FONT_MONO } from '../styles/fonts';
+import type { Ship, VesselAnalysisDto } from '../types';
+
+// ── Constants ─────────────────────────────────────────────────────────────────
+
+/** Zoom level → icon scale multiplier (matches MapLibre interpolate) */
+const ZOOM_SCALE: Record<number, number> = {
+  4: 0.8, 5: 0.9, 6: 1.0, 7: 1.2, 8: 1.5, 9: 1.8,
+  10: 2.2, 11: 2.5, 12: 2.8, 13: 3.5,
+};
+const ZOOM_SCALE_DEFAULT = 4.2; // z14+
+
+function getZoomScale(zoom: number): number {
+  if (zoom >= 14) return ZOOM_SCALE_DEFAULT;
+  return ZOOM_SCALE[zoom] ?? ZOOM_SCALE_DEFAULT;
+}
+
+/** MapLibre icon-size is a multiplier on native icon size (64px SVG).
+ *  deck.gl getSize with sizeUnits='pixels' specifies actual pixel height.
+ *  So: baseSize(0.16) * zoomScale(1.0) * 64 = 10.24px ≈ MapLibre equivalent. */
+const ICON_PX = 64;
+
+const GEAR_RE = /^.+?_\d+_\d+_?$/;
+
+// ── Hex → RGBA conversion (cached per session) ──────────────────────────────
+
+const hexCache = new Map<string, [number, number, number, number]>();
+
+function hexToRgba(hex: string, alpha = 230): [number, number, number, number] {
+  const cached = hexCache.get(hex);
+  if (cached) return cached;
+  const h = hex.replace('#', '');
+  const rgba: [number, number, number, number] = [
+    parseInt(h.substring(0, 2), 16),
+    parseInt(h.substring(2, 4), 16),
+    parseInt(h.substring(4, 6), 16),
+    alpha,
+  ];
+  hexCache.set(hex, rgba);
+  return rgba;
+}
+
+// ── Pre-computed ship render datum (avoids repeated computation in accessors)
+
+interface ShipRenderDatum {
+  mmsi: string;
+  name: string;
+  lng: number;
+  lat: number;
+  heading: number;
+  isGear: boolean;
+  isKorean: boolean;
+  isMil: boolean;
+  category: string;
+  color: [number, number, number, number];
+  baseSize: number; // SIZE_MAP value
+}
+
+function buildShipRenderData(
+  ships: Ship[],
+  militaryOnly: boolean,
+  hiddenCategories: Set<string>,
+  hiddenNationalities: Set<string>,
+): ShipRenderDatum[] {
+  const result: ShipRenderDatum[] = [];
+  for (const ship of ships) {
+    const mtCategory = getMarineTrafficCategory(ship.typecode, ship.category);
+    const natGroup = getNationalityGroup(ship.flag);
+
+    // CPU-side filtering
+    if (militaryOnly && !isMilitary(ship.category)) continue;
+    if (hiddenCategories.size > 0 && hiddenCategories.has(mtCategory)) continue;
+    if (hiddenNationalities.size > 0 && hiddenNationalities.has(natGroup)) continue;
+
+    const isGear = GEAR_RE.test(ship.name || '');
+    const hex = MT_TYPE_HEX[getMTType(ship)] || MT_TYPE_HEX.unknown;
+
+    result.push({
+      mmsi: ship.mmsi,
+      name: ship.name || '',
+      lng: ship.lng,
+      lat: ship.lat,
+      heading: ship.heading,
+      isGear,
+      isKorean: ship.flag === 'KR',
+      isMil: isMilitary(ship.category),
+      category: ship.category,
+      color: hexToRgba(hex),
+      baseSize: (isGear ? 0.8 : 1) * (SIZE_MAP[ship.category] ?? 0.12),
+    });
+  }
+  return result;
+}
+
+// ── Analysis ship markers ────────────────────────────────────────────────────
+
+interface AnalysisRenderDatum {
+  mmsi: string;
+  lng: number;
+  lat: number;
+  cog: number;
+  isGear: boolean;
+  color: [number, number, number, number];
+  baseSize: number;
+}
+
+const RISK_COLORS: Record<string, [number, number, number, number]> = {
+  CRITICAL: [239, 68, 68, 255],
+  HIGH: [249, 115, 22, 255],
+  MEDIUM: [234, 179, 8, 255],
+  LOW: [34, 197, 94, 255],
+};
+
+function buildAnalysisData(
+  ships: Ship[],
+  analysisMap: Map<string, VesselAnalysisDto>,
+): AnalysisRenderDatum[] {
+  const result: AnalysisRenderDatum[] = [];
+  for (const ship of ships) {
+    const dto = analysisMap.get(ship.mmsi);
+    if (!dto) continue;
+    const level = dto.algorithms.riskScore.level;
+    const isGear = GEAR_RE.test(ship.name || '');
+    result.push({
+      mmsi: ship.mmsi,
+      lng: ship.lng,
+      lat: ship.lat,
+      cog: ship.heading ?? 0,
+      isGear,
+      color: RISK_COLORS[level] ?? RISK_COLORS.LOW,
+      baseSize: 0.16,
+    });
+  }
+  return result;
+}
+
+// ── Hook ──────────────────────────────────────────────────────────────────────
+
+/**
+ * Builds deck.gl layers for live ship rendering.
+ *
+ * Uses zustand.subscribe to bypass React re-render cycle.
+ * Ship data updates (5s polling) and filter/hover/zoom changes
+ * trigger imperative layer rebuild → overlay.setProps().
+ */
+export function useShipDeckLayers(
+  shipLayerRef: React.MutableRefObject<Layer[]>,
+  requestRender: () => void,
+): void {
+
+  const renderFrame = useCallback(() => {
+    const state = useShipDeckStore.getState();
+    const { ships, layerVisible, militaryOnly, hiddenShipCategories, hiddenNationalities,
+      hoveredMmsi, highlightKorean, zoomLevel, analysisMap, analysisActiveFilter } = state;
+
+    // Layer off or focus mode → clear
+    const focusMode = useGearReplayStore.getState().focusMode;
+    if (!layerVisible || ships.length === 0 || focusMode) {
+      shipLayerRef.current = [];
+      requestRender();
+      return;
+    }
+
+    const zoomScale = getZoomScale(zoomLevel);
+    const layers: Layer[] = [];
+
+    // 1. Build filtered ship render data (~3K ships, <1ms)
+    const data = buildShipRenderData(ships, militaryOnly, hiddenShipCategories, hiddenNationalities);
+
+    // 2. Main ship icons — IconLayer
+    layers.push(new IconLayer<ShipRenderDatum>({
+      id: 'ship-icons',
+      data,
+      getPosition: (d) => [d.lng, d.lat],
+      getIcon: (d) => d.isGear
+        ? SHIP_ICON_MAPPING['gear-diamond']
+        : SHIP_ICON_MAPPING['ship-triangle'],
+      getSize: (d) => d.baseSize * zoomScale * ICON_PX,
+      getAngle: (d) => d.isGear ? 0 : -d.heading,
+      getColor: (d) => d.color,
+      sizeUnits: 'pixels',
+      sizeMinPixels: 3,
+      billboard: false,
+      pickable: true,
+      onClick: (info) => {
+        if (info.object) {
+          useShipDeckStore.getState().setSelectedMmsi(info.object.mmsi);
+        }
+      },
+      onHover: (info) => {
+        useShipDeckStore.getState().setHoveredMmsi(
+          info.object?.mmsi ?? null,
+          info.object ? { x: info.x, y: info.y } : undefined,
+        );
+      },
+      updateTriggers: {
+        getSize: [zoomScale],
+      },
+    }));
+
+    // 3. Korean ship rings + labels — only when highlightKorean is active
+    if (highlightKorean) {
+      const koreanShips = data.filter(d => d.isKorean);
+      if (koreanShips.length > 0) {
+        layers.push(new ScatterplotLayer<ShipRenderDatum>({
+          id: 'korean-ship-rings',
+          data: koreanShips,
+          getPosition: (d) => [d.lng, d.lat],
+          getRadius: 10 * zoomScale,
+          getFillColor: [0, 229, 255, 20],
+          getLineColor: [0, 229, 255, 255],
+          getLineWidth: 2.5,
+          stroked: true,
+          filled: true,
+          radiusUnits: 'pixels',
+          lineWidthUnits: 'pixels',
+          updateTriggers: {
+            getRadius: [zoomScale],
+          },
+        }));
+
+        layers.push(new TextLayer<ShipRenderDatum>({
+          id: 'korean-ship-labels',
+          data: koreanShips,
+          getPosition: (d) => [d.lng, d.lat],
+          getText: (d) => d.name || d.mmsi,
+          getSize: 11 * zoomScale,
+          getColor: [0, 229, 255, 255],
+          getTextAnchor: 'middle',
+          getAlignmentBaseline: 'top',
+          getPixelOffset: [0, 14],
+          fontFamily: FONT_MONO,
+          fontSettings: { sdf: true },
+          outlineWidth: 3,
+          outlineColor: [0, 0, 0, 255],
+          billboard: false,
+          characterSet: 'auto',
+          updateTriggers: { getSize: [zoomScale] },
+        }));
+      }
+    }
+
+    // 4. Hover highlight — ScatterplotLayer (conditional)
+    if (hoveredMmsi) {
+      const hoveredShip = data.find(d => d.mmsi === hoveredMmsi);
+      if (hoveredShip) {
+        layers.push(new ScatterplotLayer({
+          id: 'ship-hover-highlight',
+          data: [hoveredShip],
+          getPosition: (d: ShipRenderDatum) => [d.lng, d.lat],
+          getRadius: 18,
+          getFillColor: [255, 255, 255, 25],
+          getLineColor: [255, 255, 255, 230],
+          getLineWidth: 2,
+          stroked: true,
+          filled: true,
+          radiusUnits: 'pixels',
+          lineWidthUnits: 'pixels',
+        }));
+      }
+    }
+
+    // 5. Carrier labels — TextLayer (very few ships)
+    const carriers = data.filter(d => d.category === 'carrier');
+    if (carriers.length > 0) {
+      layers.push(new TextLayer<ShipRenderDatum>({
+        id: 'carrier-labels',
+        data: carriers,
+        getPosition: (d) => [d.lng, d.lat],
+        getText: (d) => d.name,
+        getSize: 12 * zoomScale,
+        getColor: (d) => d.color,
+        getTextAnchor: 'middle',
+        getAlignmentBaseline: 'top',
+        getPixelOffset: [0, 16],
+        fontFamily: FONT_MONO,
+        fontSettings: { sdf: true },
+        outlineWidth: 3,
+        outlineColor: [0, 0, 0, 255],
+        billboard: false,
+        characterSet: 'auto',
+        updateTriggers: { getSize: [zoomScale] },
+      }));
+    }
+
+    // 6. Analysis ship markers — IconLayer (conditional on analysisActiveFilter)
+    if (analysisMap && analysisActiveFilter) {
+      const analysisData = buildAnalysisData(ships, analysisMap);
+      if (analysisData.length > 0) {
+        layers.push(new IconLayer<AnalysisRenderDatum>({
+          id: 'analysis-ship-markers',
+          data: analysisData,
+          getPosition: (d) => [d.lng, d.lat],
+          getIcon: (d) => d.isGear
+            ? SHIP_ICON_MAPPING['gear-diamond']
+            : SHIP_ICON_MAPPING['ship-triangle'],
+          getSize: (d) => d.baseSize * zoomScale * ICON_PX * 1.3,
+          getAngle: (d) => d.isGear ? 0 : -d.cog,
+          getColor: (d) => d.color,
+          sizeUnits: 'pixels',
+          sizeMinPixels: 4,
+          billboard: false,
+          updateTriggers: { getSize: [zoomScale] },
+        }));
+      }
+    }
+
+    shipLayerRef.current = layers;
+    requestRender();
+  }, [shipLayerRef, requestRender]);
+
+  // Subscribe to all relevant state changes
+  useEffect(() => {
+    renderFrame(); // initial render
+
+    const unsub = useShipDeckStore.subscribe(
+      (s) => ({
+        ships: s.ships,
+        militaryOnly: s.militaryOnly,
+        hiddenShipCategories: s.hiddenShipCategories,
+        hiddenNationalities: s.hiddenNationalities,
+        layerVisible: s.layerVisible,
+        hoveredMmsi: s.hoveredMmsi,
+        highlightKorean: s.highlightKorean,
+        zoomLevel: s.zoomLevel,
+        analysisMap: s.analysisMap,
+        analysisActiveFilter: s.analysisActiveFilter,
+      }),
+      () => renderFrame(),
+    );
+
+    // focusMode 변경 시에도 레이어 갱신
+    const unsubFocus = useGearReplayStore.subscribe(
+      s => s.focusMode,
+      () => renderFrame(),
+    );
+
+    return () => { unsub(); unsubFocus(); };
+  }, [renderFrame]);
+}

frontend/src/services/vesselAnalysis.ts

@@ -62,6 +62,7 @@ export interface GroupPolygonDto {
   groupType: 'FLEET' | 'GEAR_IN_ZONE' | 'GEAR_OUT_ZONE';
   groupKey: string;
   groupLabel: string;
+  subClusterId: number; // 0=단일/병합, 1,2,...=서브클러스터
   snapshotTime: string;
   polygon: GeoJSON.Polygon | null;
   centerLat: number;

frontend/src/stores/gearReplayStore.ts

@@ -65,6 +65,9 @@ interface GearReplayState {
   correlationTripsData: TripsLayerDatum[];
   centerTrailSegments: CenterTrailSegment[];
   centerDotsPositions: [number, number][];
+  subClusterCenters: { subClusterId: number; path: [number, number][]; timestamps: number[] }[];
+  /** 리플레이 전체 구간에서 등장한 모든 고유 멤버 (identity 목록용) */
+  allHistoryMembers: { mmsi: string; name: string; isParent: boolean }[];
   snapshotRanges: number[];
   modelCenterTrails: ModelCenterTrail[];
 
@@ -75,6 +78,7 @@ interface GearReplayState {
   correlationByModel: Map<string, GearCorrelationItem[]>;
   showTrails: boolean;
   showLabels: boolean;
+  focusMode: boolean; // 리플레이 집중 모드 — 주변 라이브 정보 숨김
 
   // Actions
   loadHistory: (
@@ -93,6 +97,7 @@ interface GearReplayState {
   setHoveredMmsi: (mmsi: string | null) => void;
   setShowTrails: (show: boolean) => void;
   setShowLabels: (show: boolean) => void;
+  setFocusMode: (focus: boolean) => void;
   updateCorrelation: (corrData: GearCorrelationItem[], corrTracks: CorrelationVesselTrack[]) => void;
   reset: () => void;
 }
@@ -142,6 +147,8 @@ export const useGearReplayStore = create<GearReplayState>()(
       correlationTripsData: [],
       centerTrailSegments: [],
       centerDotsPositions: [],
+      subClusterCenters: [],
+      allHistoryMembers: [],
       snapshotRanges: [],
       modelCenterTrails: [],
 
@@ -151,6 +158,7 @@ export const useGearReplayStore = create<GearReplayState>()(
       hoveredMmsi: null,
       showTrails: true,
       showLabels: true,
+      focusMode: false,
       correlationByModel: new Map<string, GearCorrelationItem[]>(),
 
       // ── Actions ────────────────────────────────────────────────
@@ -238,6 +246,7 @@ export const useGearReplayStore = create<GearReplayState>()(
       setHoveredMmsi: (mmsi) => set({ hoveredMmsi: mmsi }),
       setShowTrails: (show) => set({ showTrails: show }),
       setShowLabels: (show) => set({ showLabels: show }),
+      setFocusMode: (focus) => set({ focusMode: focus }),
 
       updateCorrelation: (corrData, corrTracks) => {
         const state = get();
@@ -282,6 +291,8 @@ export const useGearReplayStore = create<GearReplayState>()(
           correlationTripsData: [],
           centerTrailSegments: [],
           centerDotsPositions: [],
+          subClusterCenters: [],
+          allHistoryMembers: [],
           snapshotRanges: [],
           modelCenterTrails: [],
           enabledModels: new Set<string>(),
@@ -289,6 +300,7 @@ export const useGearReplayStore = create<GearReplayState>()(
           hoveredMmsi: null,
           showTrails: true,
           showLabels: true,
+          focusMode: false,
           correlationByModel: new Map<string, GearCorrelationItem[]>(),
         });
       },

frontend/src/stores/shipDeckStore.ts

@@ -0,0 +1,108 @@
+import { create } from 'zustand';
+import { subscribeWithSelector } from 'zustand/middleware';
+import type { Ship, VesselAnalysisDto } from '../types';
+
+// ── Store interface ───────────────────────────────────────────────
+
+interface ShipDeckState {
+  // Ship data (from 5-second polling)
+  ships: Ship[];
+  shipMap: Map<string, Ship>; // mmsi → Ship lookup (for popup, hover)
+
+  // Filter state
+  militaryOnly: boolean;
+  hiddenShipCategories: Set<string>; // mtCategory strings like 'cargo', 'tanker'
+  hiddenNationalities: Set<string>;  // natGroup strings like 'KR', 'JP'
+  layerVisible: boolean;             // layers.ships toggle from LayerPanel
+
+  // Interaction state
+  hoveredMmsi: string | null;
+  hoverScreenPos: { x: number; y: number } | null; // screen coords for tooltip
+  selectedMmsi: string | null; // popup target
+  focusMmsi: string | null;    // external focus request (e.g., from analysis panel)
+
+  // Display state
+  highlightKorean: boolean; // korean ships ring + label toggle
+  zoomLevel: number;        // integer floor of map zoom
+
+  // Analysis state (for analysis ship markers overlay)
+  analysisMap: Map<string, VesselAnalysisDto> | null;
+  analysisActiveFilter: string | null; // 'illegalFishing' | 'darkVessel' | 'cnFishing' | null
+
+  // Actions
+  setShips: (ships: Ship[]) => void;
+  setFilters: (patch: {
+    militaryOnly?: boolean;
+    hiddenShipCategories?: Set<string>;
+    hiddenNationalities?: Set<string>;
+    layerVisible?: boolean;
+  }) => void;
+  setHoveredMmsi: (mmsi: string | null, screenPos?: { x: number; y: number }) => void;
+  setSelectedMmsi: (mmsi: string | null) => void;
+  setFocusMmsi: (mmsi: string | null) => void;
+  setHighlightKorean: (hl: boolean) => void;
+  setZoomLevel: (zoom: number) => void;
+  setAnalysis: (map: Map<string, VesselAnalysisDto> | null, filter: string | null) => void;
+}
+
+// ── Store ─────────────────────────────────────────────────────────
+
+export const useShipDeckStore = create<ShipDeckState>()(
+  subscribeWithSelector((set) => ({
+    // Ship data
+    ships: [],
+    shipMap: new Map<string, Ship>(),
+
+    // Filter state
+    militaryOnly: false,
+    hiddenShipCategories: new Set<string>(),
+    hiddenNationalities: new Set<string>(),
+    layerVisible: true,
+
+    // Interaction state
+    hoveredMmsi: null,
+    hoverScreenPos: null,
+    selectedMmsi: null,
+    focusMmsi: null,
+
+    // Display state
+    highlightKorean: false,
+    zoomLevel: 5,
+
+    // Analysis state
+    analysisMap: null,
+    analysisActiveFilter: null,
+
+    // ── Actions ────────────────────────────────────────────────
+
+    setShips: (ships) => {
+      const shipMap = new Map<string, Ship>();
+      for (const ship of ships) {
+        shipMap.set(ship.mmsi, ship);
+      }
+      set({ ships, shipMap });
+    },
+
+    setFilters: (patch) => set((state) => ({
+      militaryOnly: patch.militaryOnly ?? state.militaryOnly,
+      hiddenShipCategories: patch.hiddenShipCategories ?? state.hiddenShipCategories,
+      hiddenNationalities: patch.hiddenNationalities ?? state.hiddenNationalities,
+      layerVisible: patch.layerVisible ?? state.layerVisible,
+    })),
+
+    setHoveredMmsi: (mmsi, screenPos) => set({
+      hoveredMmsi: mmsi,
+      hoverScreenPos: mmsi ? (screenPos ?? null) : null,
+    }),
+
+    setSelectedMmsi: (mmsi) => set({ selectedMmsi: mmsi }),
+
+    setFocusMmsi: (mmsi) => set({ focusMmsi: mmsi }),
+
+    setHighlightKorean: (hl) => set({ highlightKorean: hl }),
+
+    setZoomLevel: (zoom) => set({ zoomLevel: zoom }),
+
+    setAnalysis: (map, filter) => set({ analysisMap: map, analysisActiveFilter: filter }),
+  })),
+);

frontend/src/utils/labelCluster.ts

@@ -0,0 +1,51 @@
+/**
+ * 픽셀그리드 기반 라벨 클러스터링.
+ * 줌 레벨별 지리적 그리드 셀을 계산하여 셀당 최대 N개만 표시.
+ * 정수 줌 레벨이 변경될 때만 재계산 (useMemo deps에 포함).
+ * z10+ 에서는 클러스터링 없이 전체 표시.
+ */
+
+/** 줌 레벨별 그리드 셀 크기 (도 단위, 약 80~100px 상당) */
+const CELL_SIZE_BY_ZOOM: Record<number, number> = {
+  4: 4.0,
+  5: 2.0,
+  6: 1.0,
+  7: 0.5,
+  8: 0.25,
+  9: 0.12,
+};
+
+/**
+ * 지리적 그리드 기반으로 라벨 데이터를 필터링.
+ * @param data 원본 데이터 배열
+ * @param getCoords 데이터 → [lng, lat] 추출 함수
+ * @param zoomLevel 정수 줌 레벨
+ * @param maxPerCell 셀당 최대 라벨 수 (기본 1)
+ */
+export function clusterLabels<T>(
+  data: T[],
+  getCoords: (d: T) => [number, number],
+  zoomLevel: number,
+  maxPerCell = 1,
+): T[] {
+  // z10 이상이면 모두 표시
+  if (zoomLevel >= 10) return data;
+
+  const cellSize = CELL_SIZE_BY_ZOOM[zoomLevel] ?? 0.12;
+  const grid = new Map<string, number>();
+  const result: T[] = [];
+
+  for (const item of data) {
+    const [lng, lat] = getCoords(item);
+    const cx = Math.floor(lng / cellSize);
+    const cy = Math.floor(lat / cellSize);
+    const key = `${cx},${cy}`;
+    const count = grid.get(key) ?? 0;
+    if (count < maxPerCell) {
+      grid.set(key, count + 1);
+      result.push(item);
+    }
+  }
+
+  return result;
+}

prediction/algorithms/gear_correlation.py

@@ -561,6 +561,7 @@ def run_gear_correlation(
 
     for gear_group in gear_groups:
         parent_name = gear_group['parent_name']
+        sub_cluster_id = gear_group.get('sub_cluster_id', 0)
         members = gear_group['members']
         if not members:
             continue
@@ -617,7 +618,7 @@ def run_gear_correlation(
 
             # raw 메트릭 배치 수집
             raw_batch.append((
-                now, parent_name, target_mmsi, target_type, target_name,
+                now, parent_name, sub_cluster_id, target_mmsi, target_type, target_name,
                 metrics.get('proximity_ratio'), metrics.get('visit_score'),
                 metrics.get('activity_sync'), metrics.get('dtw_similarity'),
                 metrics.get('speed_correlation'), metrics.get('heading_coherence'),
@@ -637,7 +638,7 @@ def run_gear_correlation(
                     )
 
                 # 사전 로드된 점수에서 조회 (DB 쿼리 없음)
-                score_key = (model.model_id, parent_name, target_mmsi)
+                score_key = (model.model_id, parent_name, sub_cluster_id, target_mmsi)
                 prev = all_scores.get(score_key)
                 prev_score = prev['current_score'] if prev else None
                 streak = prev['streak_count'] if prev else 0
@@ -651,7 +652,7 @@ def run_gear_correlation(
 
                 if new_score >= model.track_threshold or prev is not None:
                     score_batch.append((
-                        model.model_id, parent_name, target_mmsi,
+                        model.model_id, parent_name, sub_cluster_id, target_mmsi,
                         target_type, target_name,
                         round(new_score, 6), new_streak, state,
                         now, now, now,
@@ -703,21 +704,21 @@ def _load_active_models(conn) -> list[ModelParams]:
 
 
 def _load_all_scores(conn) -> dict[tuple, dict]:
-    """모든 점수를 사전 로드. {(model_id, group_key, target_mmsi): {...}}"""
+    """모든 점수를 사전 로드. {(model_id, group_key, sub_cluster_id, target_mmsi): {...}}"""
     cur = conn.cursor()
     try:
         cur.execute(
-            "SELECT model_id, group_key, target_mmsi, "
+            "SELECT model_id, group_key, sub_cluster_id, target_mmsi, "
             "current_score, streak_count, last_observed_at "
             "FROM kcg.gear_correlation_scores"
         )
         result = {}
         for row in cur.fetchall():
-            key = (row[0], row[1], row[2])
+            key = (row[0], row[1], row[2], row[3])
             result[key] = {
-                'current_score': row[3],
-                'streak_count': row[4],
-                'last_observed_at': row[5],
+                'current_score': row[4],
+                'streak_count': row[5],
+                'last_observed_at': row[6],
             }
         return result
     except Exception as e:
@@ -737,7 +738,7 @@ def _batch_insert_raw(conn, batch: list[tuple]):
         execute_values(
             cur,
             """INSERT INTO kcg.gear_correlation_raw_metrics
-                (observed_at, group_key, target_mmsi, target_type, target_name,
+                (observed_at, group_key, sub_cluster_id, target_mmsi, target_type, target_name,
                  proximity_ratio, visit_score, activity_sync,
                  dtw_similarity, speed_correlation, heading_coherence,
                  drift_similarity, shadow_stay, shadow_return,
@@ -762,11 +763,11 @@ def _batch_upsert_scores(conn, batch: list[tuple]):
         execute_values(
             cur,
             """INSERT INTO kcg.gear_correlation_scores
-                (model_id, group_key, target_mmsi, target_type, target_name,
+                (model_id, group_key, sub_cluster_id, target_mmsi, target_type, target_name,
                  current_score, streak_count, freeze_state,
                  first_observed_at, last_observed_at, updated_at)
             VALUES %s
-            ON CONFLICT (model_id, group_key, target_mmsi)
+            ON CONFLICT (model_id, group_key, sub_cluster_id, target_mmsi)
             DO UPDATE SET
                 target_type = EXCLUDED.target_type,
                 target_name = EXCLUDED.target_name,

prediction/algorithms/polygon_builder.py

@@ -171,6 +171,10 @@ def detect_gear_groups(
         if not m:
             continue
 
+        # 한국 국적 선박(MMSI 440/441)은 어구 AIS 미사용 → 제외
+        if mmsi.startswith('440') or mmsi.startswith('441'):
+            continue
+
         parent_raw = (m.group(1) or name).strip()
         parent_key = _normalize_parent(parent_raw)
         # 대표 이름: 공백 없는 버전 우선 (더 정규화된 형태)
@@ -256,14 +260,15 @@ def detect_gear_groups(
                 for i in idxs
             ]
 
-            # 서브그룹 이름: 1개면 원본, 2개 이상이면 #1, #2
-            sub_name = display_name if len(clusters) == 1 else f'{display_name}#{ci + 1}'
+            # group_key는 항상 원본명 유지, 서브클러스터는 별도 ID로 구분
+            sub_cluster_id = 0 if len(clusters) == 1 else (ci + 1)
             sub_mmsi = parent_mmsi if has_seed else None
 
             results.append({
-                'parent_name': sub_name,
+                'parent_name': display_name,
                 'parent_key': parent_key,
                 'parent_mmsi': sub_mmsi,
+                'sub_cluster_id': sub_cluster_id,
                 'members': members,
             })
 
@@ -294,6 +299,7 @@ def detect_gear_groups(
                         existing_mmsis.add(m['mmsi'])
                 if not big['parent_mmsi'] and small['parent_mmsi']:
                     big['parent_mmsi'] = small['parent_mmsi']
+                big['sub_cluster_id'] = 0  # 병합됨 → 단일 클러스터
                 skip.add(j)
         del big['parent_key']
         merged.append(big)
@@ -462,6 +468,7 @@ def build_all_group_snapshots(
             'group_type': 'GEAR_IN_ZONE' if in_zone else 'GEAR_OUT_ZONE',
             'group_key': parent_name,
             'group_label': parent_name,
+            'sub_cluster_id': group.get('sub_cluster_id', 0),
             'snapshot_time': now,
             'polygon_wkt': polygon_wkt,
             'center_wkt': center_wkt,

prediction/db/kcgdb.py

@@ -154,11 +154,11 @@ def save_group_snapshots(snapshots: list[dict]) -> int:
 
     insert_sql = """
         INSERT INTO kcg.group_polygon_snapshots (
-            group_type, group_key, group_label, snapshot_time,
+            group_type, group_key, group_label, sub_cluster_id, snapshot_time,
             polygon, center_point, area_sq_nm, member_count,
             zone_id, zone_name, members, color
         ) VALUES (
-            %s, %s, %s, %s,
+            %s, %s, %s, %s, %s,
             ST_GeomFromText(%s, 4326), ST_GeomFromText(%s, 4326),
             %s, %s, %s, %s, %s::jsonb, %s
         )
@@ -175,6 +175,7 @@ def save_group_snapshots(snapshots: list[dict]) -> int:
                             s['group_type'],
                             s['group_key'],
                             s['group_label'],
+                            s.get('sub_cluster_id', 0),
                             s['snapshot_time'],
                             s.get('polygon_wkt'),
                             s.get('center_wkt'),