refactor(frontend): 패키지 구조 리팩토링 + UI 버그 수정 (#38)

Co-authored-by: htlee <htlee@gcsc.co.kr>
Co-committed-by: htlee <htlee@gcsc.co.kr>

deploy/nginx-kcg.conf

@@ -49,8 +49,8 @@ server {
         proxy_read_timeout 30s;
     }
 
-    # ── 선박 이미지 프록시 ──
-    location /shipimg/ {
+    # ── 선박 이미지 프록시 (^~ = regex 정적캐시 규칙보다 우선) ──
+    location ^~ /shipimg/ {
         proxy_pass https://wing.gc-si.dev/shipimg/;
         proxy_set_header Host wing.gc-si.dev;
         proxy_ssl_server_name on;

docs/RELEASE-NOTES.md

@@ -4,6 +4,16 @@
 
 ## [Unreleased]
 
+### 변경
+- 프론트엔드 패키지 구조 리팩토링: components/ → common/layers/iran/korea/ 분리
+- App.tsx God Component 분해: 1,179줄 → 588줄 (데이터 훅 3개 추출)
+- 선박 모달 사진 탭: signal-batch → S&P Global 명칭 변경, 고화질(_2) 기본 표시
+- Overpass API 외부 호출 제거 → 정적 인프라 데이터 사용
+
+### 수정
+- LiveControls KST 시간 이중 오프셋(+9h×2) 버그 수정 + KST/UTC 토글 추가
+- nginx /shipimg/ 프록시: 정적파일 regex 우선매칭 방지 (^~ 추가)
+
 ## [2026-03-18]
 
 ### 추가

frontend/src/components/LiveControls.tsx

@@ -1,57 +0,0 @@
-import { format } from 'date-fns';
-import { useTranslation } from 'react-i18next';
-
-interface Props {
-  currentTime: number;
-  historyMinutes: number;
-  onHistoryChange: (minutes: number) => void;
-  aircraftCount: number;
-  shipCount: number;
-  satelliteCount: number;
-}
-
-const HISTORY_PRESETS = [
-  { label: '30M', minutes: 30 },
-  { label: '1H', minutes: 60 },
-  { label: '3H', minutes: 180 },
-  { label: '6H', minutes: 360 },
-  { label: '12H', minutes: 720 },
-  { label: '24H', minutes: 1440 },
-];
-
-export function LiveControls({
-  currentTime,
-  historyMinutes,
-  onHistoryChange,
-}: Props) {
-  const { t } = useTranslation();
-  const kstTime = format(new Date(currentTime + 9 * 3600_000), "yyyy-MM-dd HH:mm:ss 'KST'");
-
-  return (
-    <div className="live-controls">
-      <div className="live-indicator">
-        <span className="live-dot" />
-        <span className="live-label">{t('header.live')}</span>
-      </div>
-
-      <div className="live-clock">{kstTime}</div>
-
-      <div className="flex-1" />
-
-      <div className="history-controls">
-        <span className="history-label">{t('time.history')}</span>
-        <div className="history-presets">
-          {HISTORY_PRESETS.map(p => (
-            <button
-              key={p.label}
-              className={`history-btn ${historyMinutes === p.minutes ? 'active' : ''}`}
-              onClick={() => onHistoryChange(p.minutes)}
-            >
-              {p.label}
-            </button>
-          ))}
-        </div>
-      </div>
-    </div>
-  );
-}

frontend/src/components/common/LiveControls.tsx

@@ -0,0 +1,88 @@
+import { useTranslation } from 'react-i18next';
+import { useState } from 'react';
+
+interface Props {
+  currentTime: number;
+  historyMinutes: number;
+  onHistoryChange: (minutes: number) => void;
+  aircraftCount: number;
+  shipCount: number;
+  satelliteCount: number;
+}
+
+const HISTORY_PRESETS = [
+  { label: '30M', minutes: 30 },
+  { label: '1H', minutes: 60 },
+  { label: '3H', minutes: 180 },
+  { label: '6H', minutes: 360 },
+  { label: '12H', minutes: 720 },
+  { label: '24H', minutes: 1440 },
+];
+
+function formatTime(epoch: number, tz: 'KST' | 'UTC'): string {
+  const d = new Date(epoch);
+  if (tz === 'UTC') {
+    const pad = (n: number) => String(n).padStart(2, '0');
+    return `${d.getUTCFullYear()}-${pad(d.getUTCMonth() + 1)}-${pad(d.getUTCDate())} ${pad(d.getUTCHours())}:${pad(d.getUTCMinutes())}:${pad(d.getUTCSeconds())} UTC`;
+  }
+  // KST: 브라우저 로컬 타임존 사용 (한국 환경에서 자동 KST)
+  const pad = (n: number) => String(n).padStart(2, '0');
+  return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())} ${pad(d.getHours())}:${pad(d.getMinutes())}:${pad(d.getSeconds())} KST`;
+}
+
+export function LiveControls({
+  currentTime,
+  historyMinutes,
+  onHistoryChange,
+}: Props) {
+  const { t } = useTranslation();
+  const [timeZone, setTimeZone] = useState<'KST' | 'UTC'>('KST');
+
+  return (
+    <div className="live-controls">
+      <div className="live-indicator">
+        <span className="live-dot" />
+        <span className="live-label">{t('header.live')}</span>
+      </div>
+
+      <div className="live-clock" style={{ display: 'flex', alignItems: 'center', gap: '6px' }}>
+        <span>{formatTime(currentTime, timeZone)}</span>
+        <button
+          type="button"
+          onClick={() => setTimeZone(prev => prev === 'KST' ? 'UTC' : 'KST')}
+          style={{
+            background: 'none',
+            border: '1px solid var(--kcg-border, rgba(100, 116, 139, 0.3))',
+            color: 'var(--kcg-text-secondary, #94a3b8)',
+            borderRadius: '3px',
+            padding: '1px 5px',
+            cursor: 'pointer',
+            fontSize: '10px',
+            fontFamily: 'monospace',
+            lineHeight: 1.2,
+          }}
+          title="KST/UTC 전환"
+        >
+          {timeZone}
+        </button>
+      </div>
+
+      <div className="flex-1" />
+
+      <div className="history-controls">
+        <span className="history-label">{t('time.history')}</span>
+        <div className="history-presets">
+          {HISTORY_PRESETS.map(p => (
+            <button
+              key={p.label}
+              className={`history-btn ${historyMinutes === p.minutes ? 'active' : ''}`}
+              onClick={() => onHistoryChange(p.minutes)}
+            >
+              {p.label}
+            </button>
+          ))}
+        </div>
+      </div>
+    </div>
+  );
+}

frontend/src/components/iran/ReplayMap.tsx

@@ -2,10 +2,10 @@ import { useEffect, useMemo, useState, useRef } from 'react';
 import { useTranslation } from 'react-i18next';
 import { Map, Marker, Popup, Source, Layer, NavigationControl } from 'react-map-gl/maplibre';
 import type { MapRef } from 'react-map-gl/maplibre';
-import { AircraftLayer } from './AircraftLayer';
-import { SatelliteLayer } from './SatelliteLayer';
-import { ShipLayer } from './ShipLayer';
-import { DamagedShipLayer } from './DamagedShipLayer';
+import { AircraftLayer } from '../layers/AircraftLayer';
+import { SatelliteLayer } from '../layers/SatelliteLayer';
+import { ShipLayer } from '../layers/ShipLayer';
+import { DamagedShipLayer } from '../layers/DamagedShipLayer';
 import { OilFacilityLayer } from './OilFacilityLayer';
 import { AirportLayer } from './AirportLayer';
 import { iranOilFacilities } from '../data/oilFacilities';

frontend/src/components/iran/SatelliteMap.tsx

@@ -2,10 +2,10 @@ import { useMemo, useState, useRef } from 'react';
 import { useTranslation } from 'react-i18next';
 import { Map, Marker, Popup, Source, Layer, NavigationControl } from 'react-map-gl/maplibre';
 import type { MapRef } from 'react-map-gl/maplibre';
-import { AircraftLayer } from './AircraftLayer';
-import { SatelliteLayer } from './SatelliteLayer';
-import { ShipLayer } from './ShipLayer';
-import { DamagedShipLayer } from './DamagedShipLayer';
+import { AircraftLayer } from '../layers/AircraftLayer';
+import { SatelliteLayer } from '../layers/SatelliteLayer';
+import { ShipLayer } from '../layers/ShipLayer';
+import { DamagedShipLayer } from '../layers/DamagedShipLayer';
 import { OilFacilityLayer } from './OilFacilityLayer';
 import { AirportLayer } from './AirportLayer';
 import { iranOilFacilities } from '../data/oilFacilities';

frontend/src/components/korea/KoreaMap.tsx

@@ -2,10 +2,10 @@ import { useRef, useState, useEffect } from 'react';
 import { useTranslation } from 'react-i18next';
 import { Map, NavigationControl, Marker, Source, Layer } from 'react-map-gl/maplibre';
 import type { MapRef } from 'react-map-gl/maplibre';
-import { ShipLayer } from './ShipLayer';
+import { ShipLayer } from '../layers/ShipLayer';
 import { InfraLayer } from './InfraLayer';
-import { SatelliteLayer } from './SatelliteLayer';
-import { AircraftLayer } from './AircraftLayer';
+import { SatelliteLayer } from '../layers/SatelliteLayer';
+import { AircraftLayer } from '../layers/AircraftLayer';
 import { SubmarineCableLayer } from './SubmarineCableLayer';
 import { CctvLayer } from './CctvLayer';
 import { KoreaAirportLayer } from './KoreaAirportLayer';

frontend/src/components/layers/ShipLayer.tsx

@@ -129,7 +129,7 @@ const LOCAL_SHIP_PHOTOS: Record<string, string> = {
 interface VesselPhotoData { url: string; }
 const vesselPhotoCache = new Map<string, VesselPhotoData | null>();
 
-type PhotoSource = 'signal-batch' | 'marinetraffic';
+type PhotoSource = 'spglobal' | 'marinetraffic';
 
 interface VesselPhotoProps {
   mmsi: string;
@@ -137,15 +137,20 @@ interface VesselPhotoProps {
   shipImagePath?: string | null;
 }
 
+function toHighRes(path: string): string {
+  return path.replace(/_1\.(jpg|jpeg|png)$/i, '_2.$1');
+}
+
 function VesselPhoto({ mmsi, shipImagePath }: VesselPhotoProps) {
-  const { t } = useTranslation('ships');
   const localUrl = LOCAL_SHIP_PHOTOS[mmsi];
 
-  // Determine available tabs
-  const hasSignalBatch = !!shipImagePath;
-  const defaultTab: PhotoSource = hasSignalBatch ? 'signal-batch' : 'marinetraffic';
+  const hasSPGlobal = !!shipImagePath;
+  const defaultTab: PhotoSource = hasSPGlobal ? 'spglobal' : 'marinetraffic';
   const [activeTab, setActiveTab] = useState<PhotoSource>(defaultTab);
 
+  // S&P Global image error state
+  const [spgError, setSpgError] = useState(false);
+
   // MarineTraffic image state (lazy loaded)
   const [mtPhoto, setMtPhoto] = useState<VesselPhotoData | null | undefined>(() => {
     return vesselPhotoCache.has(mmsi) ? vesselPhotoCache.get(mmsi) : undefined;
@@ -165,8 +170,8 @@ function VesselPhoto({ mmsi, shipImagePath }: VesselPhotoProps) {
   let currentUrl: string | null = null;
   if (localUrl) {
     currentUrl = localUrl;
-  } else if (activeTab === 'signal-batch' && shipImagePath) {
-    currentUrl = shipImagePath;
+  } else if (activeTab === 'spglobal' && shipImagePath && !spgError) {
+    currentUrl = toHighRes(shipImagePath);
   } else if (activeTab === 'marinetraffic' && mtPhoto) {
     currentUrl = mtPhoto.url;
   }
@@ -183,17 +188,19 @@ function VesselPhoto({ mmsi, shipImagePath }: VesselPhotoProps) {
     );
   }
 
+  const noPhoto = (!hasSPGlobal || spgError) && mtPhoto === null;
+
   return (
     <div className="mb-1.5">
       <div className="flex gap-0.5 mb-1 rounded bg-kcg-bg p-0.5">
-        {hasSignalBatch && (
+        {hasSPGlobal && (
           <div
             className={`flex-1 py-0.5 text-center cursor-pointer rounded transition-all text-[9px] font-semibold ${
-              activeTab === 'signal-batch' ? 'bg-[#1565c0] text-white' : 'bg-transparent text-kcg-muted'
+              activeTab === 'spglobal' ? 'bg-[#1565c0] text-white' : 'bg-transparent text-kcg-muted'
             }`}
-            onClick={() => setActiveTab('signal-batch')}
+            onClick={() => setActiveTab('spglobal')}
           >
-            signal-batch
+            S&P Global
           </div>
         )}
         <div
@@ -208,12 +215,26 @@ function VesselPhoto({ mmsi, shipImagePath }: VesselPhotoProps) {
       {currentUrl ? (
         <img src={currentUrl} alt="Vessel"
           className="w-full rounded block"
-          onError={(e) => { (e.target as HTMLImageElement).style.display = 'none'; }}
+          onError={(e) => {
+            const el = e.target as HTMLImageElement;
+            if (activeTab === 'spglobal') {
+              setSpgError(true);
+              el.style.display = 'none';
+            } else {
+              el.style.display = 'none';
+            }
+          }}
         />
+      ) : noPhoto ? (
+        <div className="text-center py-3 text-kcg-dim text-[10px] border border-dashed border-kcg-border-light rounded">
+          No photo available
+        </div>
       ) : (
         activeTab === 'marinetraffic' && mtPhoto === undefined
-          ? <div className="text-center p-2 text-kcg-dim text-[10px]">{t('popup.loading')}</div>
-          : null
+          ? <div className="text-center py-3 text-kcg-dim text-[10px]">Loading...</div>
+          : <div className="text-center py-3 text-kcg-dim text-[10px] border border-dashed border-kcg-border-light rounded">
+              No photo available
+            </div>
       )}
     </div>
   );

frontend/src/hooks/useIranData.ts

@@ -0,0 +1,256 @@
+import { useState, useEffect, useMemo, useRef } from 'react';
+import { fetchEvents, fetchSensorData } from '../services/api';
+import { fetchAircraftFromBackend } from '../services/aircraftApi';
+import { getSampleAircraft } from '../data/sampleAircraft';
+import { fetchSatelliteTLE, propagateAll } from '../services/celestrak';
+import { fetchShips } from '../services/ships';
+import { fetchOsintFeed } from '../services/osint';
+import type { OsintItem } from '../services/osint';
+import { propagateAircraft, propagateShips } from '../services/propagation';
+import { getMarineTrafficCategory } from '../utils/marineTraffic';
+import type { GeoEvent, SensorLog, Aircraft, Ship, Satellite, SatellitePosition, AppMode } from '../types';
+
+interface UseIranDataArgs {
+  appMode: AppMode;
+  currentTime: number;
+  isLive: boolean;
+  hiddenAcCategories: Set<string>;
+  hiddenShipCategories: Set<string>;
+  refreshKey: number;
+  dashboardTab: 'iran' | 'korea';
+}
+
+interface UseIranDataResult {
+  aircraft: Aircraft[];
+  ships: Ship[];
+  visibleAircraft: Aircraft[];
+  visibleShips: Ship[];
+  satPositions: SatellitePosition[];
+  events: GeoEvent[];
+  mergedEvents: GeoEvent[];
+  sensorData: SensorLog[];
+  osintFeed: OsintItem[];
+  aircraftByCategory: Record<string, number>;
+  militaryCount: number;
+  shipsByCategory: Record<string, number>;
+  koreanShips: Ship[];
+  koreanShipsByCategory: Record<string, number>;
+}
+
+export function useIranData({
+  appMode,
+  currentTime,
+  isLive,
+  hiddenAcCategories,
+  hiddenShipCategories,
+  refreshKey,
+  dashboardTab,
+}: UseIranDataArgs): UseIranDataResult {
+  const [events, setEvents] = useState<GeoEvent[]>([]);
+  const [sensorData, setSensorData] = useState<SensorLog[]>([]);
+  const [baseAircraft, setBaseAircraft] = useState<Aircraft[]>([]);
+  const [baseShips, setBaseShips] = useState<Ship[]>([]);
+  const [satellites, setSatellites] = useState<Satellite[]>([]);
+  const [satPositions, setSatPositions] = useState<SatellitePosition[]>([]);
+  const [osintFeed, setOsintFeed] = useState<OsintItem[]>([]);
+
+  const satTimeRef = useRef(0);
+
+  // Load initial data
+  useEffect(() => {
+    fetchEvents().then(setEvents).catch(() => {});
+    fetchSensorData().then(setSensorData).catch(() => {});
+    fetchSatelliteTLE().then(setSatellites).catch(() => {});
+  }, [refreshKey]);
+
+  // Fetch base aircraft data (LIVE: backend, REPLAY: sample)
+  useEffect(() => {
+    const load = async () => {
+      if (appMode === 'live') {
+        const result = await fetchAircraftFromBackend('iran');
+        if (result.length > 0) setBaseAircraft(result);
+      } else {
+        setBaseAircraft(getSampleAircraft());
+      }
+    };
+    load();
+    const interval = setInterval(load, 60_000);
+    return () => clearInterval(interval);
+  }, [appMode, refreshKey]);
+
+  // Fetch Iran ship data (signal-batch + sample military, 5-min cycle)
+  useEffect(() => {
+    const load = async () => {
+      try {
+        const data = await fetchShips();
+        if (data.length > 0) {
+          setBaseShips(data);
+        }
+      } catch {
+        // keep previous data
+      }
+    };
+    load();
+    const interval = setInterval(load, 300_000);
+    return () => clearInterval(interval);
+  }, [appMode, refreshKey]);
+
+  // Fetch OSINT feed — live mode (both tabs) + replay mode (iran tab)
+  useEffect(() => {
+    const shouldFetch = isLive || dashboardTab === 'iran';
+    if (!shouldFetch) { setOsintFeed([]); return; }
+    const load = async () => {
+      try {
+        const data = await fetchOsintFeed('iran');
+        if (data.length > 0) setOsintFeed(data);
+      } catch { /* keep previous */ }
+    };
+    setOsintFeed([]);
+    load();
+    const interval = setInterval(load, 120_000);
+    return () => clearInterval(interval);
+  }, [isLive, dashboardTab, refreshKey]);
+
+  // Propagate satellite positions — throttle to every 2s of real time
+  useEffect(() => {
+    if (satellites.length === 0) return;
+    const now = Date.now();
+    if (now - satTimeRef.current < 2000) return;
+    satTimeRef.current = now;
+    const positions = propagateAll(satellites, new Date(currentTime));
+    setSatPositions(positions);
+  }, [satellites, currentTime]);
+
+  // Propagate aircraft positions based on current time
+  const aircraft = useMemo(
+    () => propagateAircraft(baseAircraft, currentTime),
+    [baseAircraft, currentTime],
+  );
+
+  // Propagate ship positions based on current time
+  const ships = useMemo(
+    () => propagateShips(baseShips, currentTime, isLive),
+    [baseShips, currentTime, isLive],
+  );
+
+  // Category-filtered data for map rendering
+  const visibleAircraft = useMemo(
+    () => aircraft.filter(a => !hiddenAcCategories.has(a.category)),
+    [aircraft, hiddenAcCategories],
+  );
+
+  const visibleShips = useMemo(
+    () => ships.filter(s => !hiddenShipCategories.has(getMarineTrafficCategory(s.typecode, s.category))),
+    [ships, hiddenShipCategories],
+  );
+
+  // OSINT → GeoEvent 변환
+  const osintEvents = useMemo((): GeoEvent[] => {
+    if (dashboardTab !== 'iran' || osintFeed.length === 0) return [];
+
+    const STRIKE_PATTERN = /strike|attack|bomb|airstrike|hit|destroy|blast|공습|타격|폭격|파괴|피격/i;
+    const MISSILE_PATTERN = /missile|launch|drone|발사|미사일|드론/i;
+    const EXPLOSION_PATTERN = /explo|blast|deton|fire|폭발|화재|폭파/i;
+    const INTERCEPT_PATTERN = /intercept|shoot.*down|defense|요격|격추|방어/i;
+    const IMPACT_PATTERN = /impact|hit|struck|damage|casualt|피격|타격|피해|사상/i;
+
+    const categoryToType: Record<string, GeoEvent['type']> = {
+      military: 'osint',
+      shipping: 'osint',
+      oil: 'osint',
+      nuclear: 'osint',
+      diplomacy: 'osint',
+    };
+
+    return osintFeed
+      .filter(item => {
+        if (!item.lat || !item.lng) return false;
+        return item.category in categoryToType;
+      })
+      .map((item): GeoEvent => {
+        let eventType: GeoEvent['type'] = 'osint';
+        const title = item.title;
+        if (IMPACT_PATTERN.test(title)) eventType = 'impact';
+        else if (STRIKE_PATTERN.test(title)) eventType = 'airstrike';
+        else if (MISSILE_PATTERN.test(title)) eventType = 'missile_launch';
+        else if (EXPLOSION_PATTERN.test(title)) eventType = 'explosion';
+        else if (INTERCEPT_PATTERN.test(title)) eventType = 'intercept';
+
+        let source: GeoEvent['source'] | undefined;
+        if (/US|미국|America|Pentagon|CENTCOM/i.test(title)) source = 'US';
+        else if (/Israel|이스라엘|IAF|IDF/i.test(title)) source = 'IL';
+        else if (/Iran|이란|IRGC/i.test(title)) source = 'IR';
+        else if (/Houthi|후티|Hezbollah|헤즈볼라|PMF|proxy|대리/i.test(title)) source = 'proxy';
+
+        return {
+          id: `osint-${item.id}`,
+          timestamp: item.timestamp,
+          lat: item.lat!,
+          lng: item.lng!,
+          type: eventType,
+          source,
+          label: `[OSINT] ${item.title}`,
+          description: `출처: ${item.source} | ${item.url}`,
+          intensity: eventType === 'impact' ? 80 : eventType === 'airstrike' ? 70 : 50,
+        };
+      });
+  }, [osintFeed, dashboardTab]);
+
+  // 기본 이벤트 + OSINT 이벤트 병합 (시간순 정렬)
+  const mergedEvents = useMemo(() => {
+    if (osintEvents.length === 0) return events;
+    return [...events, ...osintEvents].sort((a, b) => a.timestamp - b.timestamp);
+  }, [events, osintEvents]);
+
+  // Aircraft stats
+  const aircraftByCategory = useMemo(() => {
+    const counts: Record<string, number> = {};
+    for (const ac of aircraft) {
+      counts[ac.category] = (counts[ac.category] || 0) + 1;
+    }
+    return counts;
+  }, [aircraft]);
+
+  const militaryCount = useMemo(
+    () => aircraft.filter(a => a.category !== 'civilian' && a.category !== 'unknown').length,
+    [aircraft],
+  );
+
+  // Ship stats — MT classification
+  const shipsByCategory = useMemo(() => {
+    const counts: Record<string, number> = {};
+    for (const s of ships) {
+      const mtCat = getMarineTrafficCategory(s.typecode, s.category);
+      counts[mtCat] = (counts[mtCat] || 0) + 1;
+    }
+    return counts;
+  }, [ships]);
+
+  // Korean ship stats
+  const koreanShips = useMemo(() => ships.filter(s => s.flag === 'KR'), [ships]);
+  const koreanShipsByCategory = useMemo(() => {
+    const counts: Record<string, number> = {};
+    for (const s of koreanShips) {
+      const mtCat = getMarineTrafficCategory(s.typecode, s.category);
+      counts[mtCat] = (counts[mtCat] || 0) + 1;
+    }
+    return counts;
+  }, [koreanShips]);
+
+  return {
+    aircraft,
+    ships,
+    visibleAircraft,
+    visibleShips,
+    satPositions,
+    events,
+    mergedEvents,
+    sensorData,
+    osintFeed,
+    aircraftByCategory,
+    militaryCount,
+    shipsByCategory,
+    koreanShips,
+    koreanShipsByCategory,
+  };
+}

frontend/src/hooks/useKoreaData.ts

@@ -0,0 +1,160 @@
+import { useState, useEffect, useMemo, useRef } from 'react';
+import { fetchAircraftFromBackend } from '../services/aircraftApi';
+import { fetchSatelliteTLEKorea, propagateAll } from '../services/celestrak';
+import { fetchShipsKorea } from '../services/ships';
+import { fetchOsintFeed } from '../services/osint';
+import type { OsintItem } from '../services/osint';
+import { propagateAircraft, propagateShips } from '../services/propagation';
+import { getMarineTrafficCategory } from '../utils/marineTraffic';
+import type { Aircraft, Ship, Satellite, SatellitePosition } from '../types';
+
+interface UseKoreaDataArgs {
+  currentTime: number;
+  isLive: boolean;
+  hiddenAcCategories: Set<string>;
+  hiddenShipCategories: Set<string>;
+  refreshKey: number;
+}
+
+interface UseKoreaDataResult {
+  aircraft: Aircraft[];
+  ships: Ship[];
+  visibleAircraft: Aircraft[];
+  visibleShips: Ship[];
+  satPositions: SatellitePosition[];
+  osintFeed: OsintItem[];
+  koreaKoreanShips: Ship[];
+  koreaChineseShips: Ship[];
+  shipsByCategory: Record<string, number>;
+  aircraftByCategory: Record<string, number>;
+  militaryCount: number;
+}
+
+export function useKoreaData({
+  currentTime,
+  isLive,
+  hiddenAcCategories,
+  hiddenShipCategories,
+  refreshKey,
+}: UseKoreaDataArgs): UseKoreaDataResult {
+  const [baseAircraftKorea, setBaseAircraftKorea] = useState<Aircraft[]>([]);
+  const [baseShipsKorea, setBaseShipsKorea] = useState<Ship[]>([]);
+  const [satellitesKorea, setSatellitesKorea] = useState<Satellite[]>([]);
+  const [satPositionsKorea, setSatPositionsKorea] = useState<SatellitePosition[]>([]);
+  const [osintFeed, setOsintFeed] = useState<OsintItem[]>([]);
+
+  const satTimeKoreaRef = useRef(0);
+
+  // Fetch Korea satellite TLE data
+  useEffect(() => {
+    fetchSatelliteTLEKorea().then(setSatellitesKorea).catch(() => {});
+  }, [refreshKey]);
+
+  // Fetch Korea aircraft data
+  useEffect(() => {
+    const load = async () => {
+      const result = await fetchAircraftFromBackend('korea');
+      if (result.length > 0) setBaseAircraftKorea(result);
+    };
+    load();
+    const interval = setInterval(load, 60_000);
+    return () => clearInterval(interval);
+  }, [refreshKey]);
+
+  // Fetch Korea region ship data (signal-batch, 4-min cycle)
+  useEffect(() => {
+    const load = async () => {
+      try {
+        const data = await fetchShipsKorea();
+        if (data.length > 0) setBaseShipsKorea(data);
+      } catch { /* keep previous */ }
+    };
+    load();
+    const interval = setInterval(load, 240_000);
+    return () => clearInterval(interval);
+  }, [refreshKey]);
+
+  // Fetch OSINT feed for Korea tab
+  useEffect(() => {
+    const load = async () => {
+      try {
+        const data = await fetchOsintFeed('korea');
+        if (data.length > 0) setOsintFeed(data);
+      } catch { /* keep previous */ }
+    };
+    load();
+    const interval = setInterval(load, 120_000);
+    return () => clearInterval(interval);
+  }, [refreshKey]);
+
+  // Propagate Korea satellite positions
+  useEffect(() => {
+    if (satellitesKorea.length === 0) return;
+    const now = Date.now();
+    if (now - satTimeKoreaRef.current < 2000) return;
+    satTimeKoreaRef.current = now;
+    const positions = propagateAll(satellitesKorea, new Date(currentTime));
+    setSatPositionsKorea(positions);
+  }, [satellitesKorea, currentTime]);
+
+  // Propagate Korea aircraft (live only — no waypoint propagation needed)
+  const aircraft = useMemo(() => propagateAircraft(baseAircraftKorea, currentTime), [baseAircraftKorea, currentTime]);
+
+  // Korea region ships
+  const ships = useMemo(
+    () => propagateShips(baseShipsKorea, currentTime, isLive),
+    [baseShipsKorea, currentTime, isLive],
+  );
+
+  // Category-filtered data for map rendering
+  const visibleAircraft = useMemo(
+    () => aircraft.filter(a => !hiddenAcCategories.has(a.category)),
+    [aircraft, hiddenAcCategories],
+  );
+
+  const visibleShips = useMemo(
+    () => ships.filter(s => !hiddenShipCategories.has(getMarineTrafficCategory(s.typecode, s.category))),
+    [ships, hiddenShipCategories],
+  );
+
+  // Korea region stats
+  const koreaKoreanShips = useMemo(() => ships.filter(s => s.flag === 'KR'), [ships]);
+  const koreaChineseShips = useMemo(() => ships.filter(s => s.flag === 'CN'), [ships]);
+
+  const shipsByCategory = useMemo(() => {
+    const counts: Record<string, number> = {};
+    for (const s of ships) {
+      const mtCat = getMarineTrafficCategory(s.typecode, s.category);
+      counts[mtCat] = (counts[mtCat] || 0) + 1;
+    }
+    return counts;
+  }, [ships]);
+
+  // Korea aircraft stats
+  const aircraftByCategory = useMemo(() => {
+    const counts: Record<string, number> = {};
+    for (const ac of aircraft) {
+      counts[ac.category] = (counts[ac.category] || 0) + 1;
+    }
+    return counts;
+  }, [aircraft]);
+
+  const militaryCount = useMemo(
+    () => aircraft.filter(a => a.category !== 'civilian' && a.category !== 'unknown').length,
+    [aircraft],
+  );
+
+  return {
+    aircraft,
+    ships,
+    visibleAircraft,
+    visibleShips,
+    satPositions: satPositionsKorea,
+    osintFeed,
+    koreaKoreanShips,
+    koreaChineseShips,
+    shipsByCategory,
+    aircraftByCategory,
+    militaryCount,
+  };
+}

frontend/src/hooks/useKoreaFilters.ts

@@ -0,0 +1,320 @@
+import { useState, useMemo, useRef } from 'react';
+import { KOREA_SUBMARINE_CABLES } from '../services/submarineCable';
+import { getMarineTrafficCategory } from '../utils/marineTraffic';
+import type { Ship } from '../types';
+
+interface KoreaFilters {
+  illegalFishing: boolean;
+  illegalTransship: boolean;
+  darkVessel: boolean;
+  cableWatch: boolean;
+  dokdoWatch: boolean;
+  ferryWatch: boolean;
+}
+
+interface DokdoAlert {
+  mmsi: string;
+  name: string;
+  dist: number;
+  time: number;
+}
+
+interface UseKoreaFiltersResult {
+  filters: KoreaFilters;
+  setFilter: (key: keyof KoreaFilters, value: boolean) => void;
+  filteredShips: Ship[];
+  transshipSuspects: Set<string>;
+  cableWatchSuspects: Set<string>;
+  dokdoWatchSuspects: Set<string>;
+  dokdoAlerts: DokdoAlert[];
+  anyFilterOn: boolean;
+}
+
+const TRANSSHIP_DURATION_MS = 60 * 60 * 1000; // 1시간
+const ONE_HOUR_MS = 60 * 60 * 1000;
+const CABLE_DURATION_MS = 3 * 60 * 60 * 1000; // 3시간
+const DOKDO = { lat: 37.2417, lng: 131.8647 };
+const TERRITORIAL_DEG = 0.2; // ~22km (12해리)
+const ALERT_DEG = 0.4; // ~44km
+
+export function useKoreaFilters(
+  koreaShips: Ship[],
+  visibleShips: Ship[],
+  currentTime: number,
+): UseKoreaFiltersResult {
+  const [filters, setFilters] = useState<KoreaFilters>({
+    illegalFishing: false,
+    illegalTransship: false,
+    darkVessel: false,
+    cableWatch: false,
+    dokdoWatch: false,
+    ferryWatch: false,
+  });
+  const [dokdoAlerts, setDokdoAlerts] = useState<DokdoAlert[]>([]);
+
+  const proximityStartRef = useRef<Map<string, number>>(new Map());
+  const aisHistoryRef = useRef<Map<string, { seen: number[]; lastGapStart: number | null }>>(new Map());
+  const cableNearStartRef = useRef<Map<string, number>>(new Map());
+  const dokdoAlertedRef = useRef<Set<string>>(new Set());
+
+  const setFilter = (key: keyof KoreaFilters, value: boolean) => {
+    setFilters(prev => ({ ...prev, [key]: value }));
+  };
+
+  const anyFilterOn =
+    filters.illegalFishing ||
+    filters.illegalTransship ||
+    filters.darkVessel ||
+    filters.cableWatch ||
+    filters.dokdoWatch ||
+    filters.ferryWatch;
+
+  // 불법환적 의심 선박 탐지
+  const transshipSuspects = useMemo(() => {
+    if (!filters.illegalTransship) return new Set<string>();
+
+    const suspects = new Set<string>();
+    const isOffshore = (s: Ship) => {
+      const nearCoastWest = s.lng > 125.5 && s.lng < 130.0 && s.lat > 33.5 && s.lat < 38.5;
+      if (nearCoastWest) {
+        const distFromEastCoast = s.lng - 129.5;
+        const distFromWestCoast = 126.0 - s.lng;
+        const distFromSouthCoast = 34.5 - s.lat;
+        if (distFromEastCoast > 0.15 || distFromWestCoast > 0.15 || distFromSouthCoast > 0.15) return true;
+        return false;
+      }
+      return true;
+    };
+
+    const isNearForeignCoast = (s: Ship) => {
+      if (s.lng < 123.5 && s.lat > 25 && s.lat < 40) return true;
+      if (s.lng > 130.5 && s.lat > 30 && s.lat < 46) return true;
+      if (s.lng > 129.1 && s.lng < 129.6 && s.lat > 34.0 && s.lat < 34.8) return true;
+      if (s.lng > 129.5 && s.lat > 31 && s.lat < 34) return true;
+      return false;
+    };
+
+    const candidates = koreaShips.filter(s => {
+      if (s.speed >= 2) return false;
+      const mtCat = getMarineTrafficCategory(s.typecode, s.category);
+      if (mtCat !== 'tanker' && mtCat !== 'cargo' && mtCat !== 'fishing') return false;
+      if (isNearForeignCoast(s)) return false;
+      return isOffshore(s);
+    });
+
+    const now = currentTime;
+    const prevMap = proximityStartRef.current;
+    const currentPairs = new Set<string>();
+    const PROXIMITY_DEG = 0.001; // ~110m
+
+    for (let i = 0; i < candidates.length; i++) {
+      for (let j = i + 1; j < candidates.length; j++) {
+        const a = candidates[i];
+        const b = candidates[j];
+        const dlat = Math.abs(a.lat - b.lat);
+        const dlng = Math.abs(a.lng - b.lng) * Math.cos((a.lat * Math.PI) / 180);
+        if (dlat < PROXIMITY_DEG && dlng < PROXIMITY_DEG) {
+          const pairKey = [a.mmsi, b.mmsi].sort().join(':');
+          currentPairs.add(pairKey);
+          if (!prevMap.has(pairKey)) {
+            prevMap.set(pairKey, now);
+          }
+          const pairStartTime = prevMap.get(pairKey)!;
+          if (now - pairStartTime >= TRANSSHIP_DURATION_MS) {
+            suspects.add(a.mmsi);
+            suspects.add(b.mmsi);
+          }
+        }
+      }
+    }
+
+    for (const key of prevMap.keys()) {
+      if (!currentPairs.has(key)) prevMap.delete(key);
+    }
+
+    return suspects;
+  }, [koreaShips, filters.illegalTransship, currentTime]);
+
+  // 다크베셀 탐지: AIS 신호 이력 추적
+  const darkVesselSet = useMemo(() => {
+    if (!filters.darkVessel) return new Set<string>();
+
+    const now = currentTime;
+    const history = aisHistoryRef.current;
+    const result = new Set<string>();
+    const currentMmsis = new Set(koreaShips.map(s => s.mmsi));
+
+    for (const s of koreaShips) {
+      let h = history.get(s.mmsi);
+      if (!h) {
+        h = { seen: [], lastGapStart: null };
+        history.set(s.mmsi, h);
+      }
+      if (h.lastGapStart !== null) {
+        const gapDuration = now - h.lastGapStart;
+        if (gapDuration >= ONE_HOUR_MS) {
+          result.add(s.mmsi);
+        }
+        h.lastGapStart = null;
+      }
+      h.seen.push(now);
+      if (h.seen.length > 20) h.seen = h.seen.slice(-20);
+
+      const aisAge = now - s.lastSeen;
+      if (aisAge > ONE_HOUR_MS) {
+        result.add(s.mmsi);
+      }
+
+      if (h.seen.length >= 4) {
+        let gapCount = 0;
+        for (let k = 1; k < h.seen.length; k++) {
+          const gap = h.seen[k] - h.seen[k - 1];
+          if (gap > 150_000) gapCount++;
+        }
+        if (gapCount >= 3) {
+          result.add(s.mmsi);
+        }
+      }
+    }
+
+    for (const [mmsi, h] of history.entries()) {
+      if (!currentMmsis.has(mmsi) && h.lastGapStart === null) {
+        h.lastGapStart = now;
+      }
+    }
+
+    const SIX_HOURS = 6 * ONE_HOUR_MS;
+    for (const [mmsi, h] of history.entries()) {
+      if (h.seen.length > 0 && now - h.seen[h.seen.length - 1] > SIX_HOURS && !currentMmsis.has(mmsi)) {
+        history.delete(mmsi);
+      }
+    }
+
+    return result;
+  }, [koreaShips, filters.darkVessel, currentTime]);
+
+  // 해저케이블 감시
+  const cableWatchSet = useMemo(() => {
+    if (!filters.cableWatch) return new Set<string>();
+    const result = new Set<string>();
+    const CABLE_PROX_DEG = 0.01; // ~1.1km
+
+    const segments: [number, number, number, number][] = [];
+    for (const cable of KOREA_SUBMARINE_CABLES) {
+      for (let k = 0; k < cable.route.length - 1; k++) {
+        segments.push([cable.route[k][0], cable.route[k][1], cable.route[k + 1][0], cable.route[k + 1][1]]);
+      }
+    }
+
+    const distToSegment = (px: number, py: number, x1: number, y1: number, x2: number, y2: number) => {
+      const dx = x2 - x1;
+      const dy = y2 - y1;
+      if (dx === 0 && dy === 0) return Math.hypot(px - x1, py - y1);
+      const t = Math.max(0, Math.min(1, ((px - x1) * dx + (py - y1) * dy) / (dx * dx + dy * dy)));
+      const cx = x1 + t * dx;
+      const cy = y1 + t * dy;
+      const dlng = (px - cx) * Math.cos((py * Math.PI) / 180);
+      return Math.hypot(dlng, py - cy);
+    };
+
+    const now = currentTime;
+    const prevMap = cableNearStartRef.current;
+    const currentNear = new Set<string>();
+
+    for (const s of koreaShips) {
+      if (s.speed > 0.6) continue;
+      let nearCable = false;
+      for (const [x1, y1, x2, y2] of segments) {
+        if (distToSegment(s.lng, s.lat, x1, y1, x2, y2) < CABLE_PROX_DEG) {
+          nearCable = true;
+          break;
+        }
+      }
+      if (!nearCable) continue;
+
+      currentNear.add(s.mmsi);
+      if (!prevMap.has(s.mmsi)) {
+        prevMap.set(s.mmsi, now);
+      }
+      const cableStartTime = prevMap.get(s.mmsi)!;
+      if (now - cableStartTime >= CABLE_DURATION_MS) {
+        result.add(s.mmsi);
+      }
+    }
+
+    for (const mmsi of prevMap.keys()) {
+      if (!currentNear.has(mmsi)) prevMap.delete(mmsi);
+    }
+
+    return result;
+  }, [koreaShips, filters.cableWatch, currentTime]);
+
+  // 독도감시
+  const dokdoWatchSet = useMemo(() => {
+    if (!filters.dokdoWatch) return new Set<string>();
+    const result = new Set<string>();
+    const newAlerts: DokdoAlert[] = [];
+    const alerted = dokdoAlertedRef.current;
+
+    for (const s of koreaShips) {
+      if (s.flag !== 'JP') continue;
+      const dDokdo = Math.hypot(
+        (s.lng - DOKDO.lng) * Math.cos((DOKDO.lat * Math.PI) / 180),
+        s.lat - DOKDO.lat,
+      );
+      if (dDokdo < TERRITORIAL_DEG) {
+        result.add(s.mmsi);
+        if (!alerted.has(s.mmsi)) {
+          alerted.add(s.mmsi);
+          const distKm = Math.round(dDokdo * 111);
+          newAlerts.push({ mmsi: s.mmsi, name: s.name || s.mmsi, dist: distKm, time: currentTime });
+        }
+      } else if (dDokdo < ALERT_DEG) {
+        result.add(s.mmsi);
+        if (!alerted.has(`warn-${s.mmsi}`)) {
+          alerted.add(`warn-${s.mmsi}`);
+          const distKm = Math.round(dDokdo * 111);
+          newAlerts.push({ mmsi: s.mmsi, name: s.name || s.mmsi, dist: distKm, time: currentTime });
+        }
+      }
+    }
+
+    const currentJP = new Set(koreaShips.filter(s => s.flag === 'JP').map(s => s.mmsi));
+    for (const key of alerted) {
+      const mmsi = key.replace('warn-', '');
+      if (!currentJP.has(mmsi)) alerted.delete(key);
+    }
+
+    if (newAlerts.length > 0) {
+      setDokdoAlerts(prev => [...newAlerts, ...prev].slice(0, 10));
+    }
+
+    return result;
+  }, [koreaShips, filters.dokdoWatch, currentTime]);
+
+  // 필터링된 선박 목록
+  const filteredShips = useMemo(() => {
+    if (!anyFilterOn) return visibleShips;
+    return visibleShips.filter(s => {
+      const mtCat = getMarineTrafficCategory(s.typecode, s.category);
+      if (filters.illegalFishing && mtCat === 'fishing' && s.flag !== 'KR') return true;
+      if (filters.illegalTransship && transshipSuspects.has(s.mmsi)) return true;
+      if (filters.darkVessel && darkVesselSet.has(s.mmsi)) return true;
+      if (filters.cableWatch && cableWatchSet.has(s.mmsi)) return true;
+      if (filters.dokdoWatch && dokdoWatchSet.has(s.mmsi)) return true;
+      if (filters.ferryWatch && getMarineTrafficCategory(s.typecode, s.category) === 'passenger') return true;
+      return false;
+    });
+  }, [visibleShips, filters, anyFilterOn, transshipSuspects, darkVesselSet, cableWatchSet, dokdoWatchSet]);
+
+  return {
+    filters,
+    setFilter,
+    filteredShips,
+    transshipSuspects,
+    cableWatchSuspects: cableWatchSet,
+    dokdoWatchSuspects: dokdoWatchSet,
+    dokdoAlerts,
+    anyFilterOn,
+  };
+}

frontend/src/services/api.ts

@@ -9,14 +9,14 @@ const defaultConfig: ApiConfig = {
 
 let cachedSensorData: SensorLog[] | null = null;
 
-export async function fetchEvents(_config?: Partial<ApiConfig>): Promise<GeoEvent[]> { // eslint-disable-line @typescript-eslint/no-unused-vars
+export async function fetchEvents(_config?: Partial<ApiConfig>): Promise<GeoEvent[]> {  
   // In production, replace with actual API call:
   // const res = await fetch(config.eventsEndpoint);
   // return res.json();
   return Promise.resolve(sampleEvents);
 }
 
-export async function fetchSensorData(_config?: Partial<ApiConfig>): Promise<SensorLog[]> { // eslint-disable-line @typescript-eslint/no-unused-vars
+export async function fetchSensorData(_config?: Partial<ApiConfig>): Promise<SensorLog[]> {  
   // In production, replace with actual API call:
   // const res = await fetch(config.sensorEndpoint);
   // return res.json();

frontend/src/services/infra.ts

@@ -12,17 +12,6 @@ export interface PowerFacility {
   voltage?: string;   // for substations
 }
 
-// Overpass QL: power plants + wind generators + substations in South Korea
-const OVERPASS_QUERY = `
-[out:json][timeout:30][bbox:33,124,39,132];
-(
-  nwr["power"="plant"];
-  nwr["power"="generator"]["generator:source"="wind"];
-  nwr["power"="substation"]["substation"="transmission"];
-);
-out center 500;
-`;
-
 let cachedData: PowerFacility[] | null = null;
 let lastFetch = 0;
 const CACHE_MS = 600_000; // 10 min cache
@@ -30,67 +19,10 @@ const CACHE_MS = 600_000; // 10 min cache
 export async function fetchKoreaInfra(): Promise<PowerFacility[]> {
   if (cachedData && Date.now() - lastFetch < CACHE_MS) return cachedData;
 
-  try {
-    const url = `/api/overpass/api/interpreter`;
-    const res = await fetch(url, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
-      body: `data=${encodeURIComponent(OVERPASS_QUERY)}`,
-    });
-
-    if (!res.ok) throw new Error(`Overpass ${res.status}`);
-    const json = await res.json();
-
-    const facilities: PowerFacility[] = [];
-
-    for (const el of json.elements || []) {
-      const tags = el.tags || {};
-      const lat = el.lat ?? el.center?.lat;
-      const lng = el.lon ?? el.center?.lon;
-      if (lat == null || lng == null) continue;
-
-      const isPower = tags.power;
-      if (isPower === 'plant') {
-        facilities.push({
-          id: `plant-${el.id}`,
-          type: 'plant',
-          name: tags.name || tags['name:ko'] || tags['name:en'] || 'Power Plant',
-          lat, lng,
-          source: tags['plant:source'] || tags['generator:source'] || undefined,
-          output: tags['plant:output:electricity'] || undefined,
-          operator: tags.operator || undefined,
-        });
-      } else if (isPower === 'generator' && tags['generator:source'] === 'wind') {
-        facilities.push({
-          id: `wind-${el.id}`,
-          type: 'plant',
-          name: tags.name || tags['name:ko'] || tags['name:en'] || '풍력발전기',
-          lat, lng,
-          source: 'wind',
-          output: tags['generator:output:electricity'] || undefined,
-          operator: tags.operator || undefined,
-        });
-      } else if (isPower === 'substation') {
-        facilities.push({
-          id: `sub-${el.id}`,
-          type: 'substation',
-          name: tags.name || tags['name:ko'] || tags['name:en'] || 'Substation',
-          lat, lng,
-          voltage: tags.voltage || undefined,
-          operator: tags.operator || undefined,
-        });
-      }
-    }
-
-    console.log(`Overpass: ${facilities.length} power facilities in Korea (${facilities.filter(f => f.type === 'plant').length} plants, ${facilities.filter(f => f.type === 'substation').length} substations)`);
-    cachedData = facilities;
+  // 정적 데이터 사용 (Overpass API는 프로덕션 nginx에서 미지원 + fallback 데이터로 충분)
+  cachedData = getFallbackInfra();
   lastFetch = Date.now();
-    return facilities;
-  } catch (err) {
-    console.warn('Overpass API failed, using fallback data:', err);
-    if (cachedData) return cachedData;
-    return getFallbackInfra();
-  }
+  return cachedData;
 }
 
 // Fallback: major Korean power plants (in case API fails)

frontend/src/utils/marineTraffic.ts

@@ -0,0 +1,47 @@
+// MarineTraffic-style ship classification
+// Maps S&P STAT5CODE prefixes and our custom typecodes to MT categories
+export function getMarineTrafficCategory(typecode?: string, category?: string): string {
+  if (!typecode) {
+    // Fallback to our internal category
+    if (category === 'tanker') return 'tanker';
+    if (category === 'cargo') return 'cargo';
+    if (category === 'destroyer' || category === 'warship' || category === 'carrier' || category === 'patrol') return 'military';
+    return 'unspecified';
+  }
+  const code = typecode.toUpperCase();
+
+  // Our custom typecodes
+  if (code === 'VLCC' || code === 'LNG' || code === 'LPG') return 'tanker';
+  if (code === 'CONT' || code === 'BULK') return 'cargo';
+  if (code === 'DDH' || code === 'DDG' || code === 'CVN' || code === 'FFG' || code === 'LCS' || code === 'MCM' || code === 'PC') return 'military';
+
+  // S&P STAT5CODE (IHS StatCode5) — first 2 chars determine main category
+  // A1x = Tankers (crude, products, chemical, LPG, LNG)
+  if (code.startsWith('A1')) return 'tanker';
+  // A2x = Bulk carriers
+  if (code.startsWith('A2')) return 'cargo';
+  // A3x = General cargo / Container / Reefer / Ro-Ro
+  if (code.startsWith('A3')) return 'cargo';
+  // B1x / B2x = Passenger / Cruise / Ferry
+  if (code.startsWith('B')) return 'passenger';
+  // C1x = Fishing
+  if (code.startsWith('C')) return 'fishing';
+  // D1x = Offshore (tugs, supply, etc.)
+  if (code.startsWith('D')) return 'tug_special';
+  // E = Other activities (research, cable layers, dredgers)
+  if (code.startsWith('E')) return 'tug_special';
+  // X = Non-propelled (barges)
+  if (code.startsWith('X')) return 'unspecified';
+
+  // S&P VesselType strings
+  const lower = code.toLowerCase();
+  if (lower.includes('tanker')) return 'tanker';
+  if (lower.includes('cargo') || lower.includes('container') || lower.includes('bulk')) return 'cargo';
+  if (lower.includes('passenger') || lower.includes('cruise') || lower.includes('ferry')) return 'passenger';
+  if (lower.includes('fishing')) return 'fishing';
+  if (lower.includes('tug') || lower.includes('supply') || lower.includes('offshore')) return 'tug_special';
+  if (lower.includes('high speed')) return 'high_speed';
+  if (lower.includes('pleasure') || lower.includes('yacht') || lower.includes('sailing')) return 'pleasure';
+
+  return 'unspecified';
+}