diff --git a/frontend/src/components/korea/FleetClusterLayer.tsx b/frontend/src/components/korea/FleetClusterLayer.tsx
index 57fa7c2..920bc45 100644
--- a/frontend/src/components/korea/FleetClusterLayer.tsx
+++ b/frontend/src/components/korea/FleetClusterLayer.tsx
@@ -127,8 +127,8 @@ export function FleetClusterLayer({ ships, analysisMap, clusters, onShipSelect,
   // 비허가 어구 클러스터: parentName → { parent: Ship | null, gears: Ship[] }
   const gearGroupMap = useMemo(() => {
     const gearPattern = /^(.+?)_\d+_\d+_?$/;
-    const MAX_DIST_DEG = 0.15; // ~10NM — 모선과 어구 간 최대 거리
-    const STALE_MS = 60 * 60_000; // 60분 이내 수신 신호만
+    const MAX_DIST_DEG = 0.15; // ~10NM
+    const STALE_MS = 60 * 60_000;
     const now = Date.now();
 
     const nameToShip = new Map<string, Ship>();
@@ -139,26 +139,35 @@ export function FleetClusterLayer({ ships, analysisMap, clusters, onShipSelect,
       }
     }
 
-    const map = new Map<string, { parent: Ship | null; gears: Ship[] }>();
+    // 1단계: 같은 모선명 어구 수집 (60분 이내만)
+    const rawGroups = new Map<string, Ship[]>();
     for (const s of ships) {
-      // 60분 이내 수신 신호만
       if (now - s.lastSeen > STALE_MS) continue;
-
       const m = (s.name || '').match(gearPattern);
       if (!m) continue;
       const parentName = m[1].trim();
+      const arr = rawGroups.get(parentName) ?? [];
+      arr.push(s);
+      rawGroups.set(parentName, arr);
+    }
+
+    // 2단계: 거리 기반 서브 클러스터링 (같은 이름이라도 멀면 분리)
+    const map = new Map<string, { parent: Ship | null; gears: Ship[] }>();
+    for (const [parentName, gears] of rawGroups) {
       const parent = nameToShip.get(parentName) ?? null;
 
-      // 모선이 있으면 거리 제한 적용
-      if (parent) {
-        const dlat = Math.abs(s.lat - parent.lat);
-        const dlng = Math.abs(s.lng - parent.lng);
-        if (dlat > MAX_DIST_DEG || dlng > MAX_DIST_DEG) continue;
-      }
+      // 기준점: 모선 있으면 모선 위치, 없으면 첫 어구
+      const anchor = parent ?? gears[0];
+      if (!anchor) continue;
 
-      const entry = map.get(parentName) ?? { parent, gears: [] };
-      entry.gears.push(s);
-      map.set(parentName, entry);
+      const nearby = gears.filter(g => {
+        const dlat = Math.abs(g.lat - anchor.lat);
+        const dlng = Math.abs(g.lng - anchor.lng);
+        return dlat <= MAX_DIST_DEG && dlng <= MAX_DIST_DEG;
+      });
+
+      if (nearby.length === 0) continue;
+      map.set(parentName, { parent, gears: nearby });
     }
     return map;
   }, [ships]);