backend/src/main/java/gc/mda/kcg/domain/analysis/GearCollisionController.java

@@ -0,0 +1,64 @@
+package gc.mda.kcg.domain.analysis;
+
+import gc.mda.kcg.permission.annotation.RequirePermission;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Sort;
+import org.springframework.web.bind.annotation.*;
+
+/**
+ * 어구 정체성 충돌(GEAR_IDENTITY_COLLISION) 조회 + 분류 API.
+ *
+ * 경로: /api/analysis/gear-collisions
+ * - GET  /                     목록 (status/severity/name 필터, hours 윈도우)
+ * - GET  /stats                status/severity 집계
+ * - GET  /{id}                 단건 상세
+ * - POST /{id}/resolve         분류 (REVIEWED / CONFIRMED_ILLEGAL / FALSE_POSITIVE / REOPEN)
+ */
+@RestController
+@RequestMapping("/api/analysis/gear-collisions")
+@RequiredArgsConstructor
+public class GearCollisionController {
+
+    private static final String RESOURCE = "detection:gear-collision";
+
+    private final GearIdentityCollisionService service;
+
+    @GetMapping
+    @RequirePermission(resource = RESOURCE, operation = "READ")
+    public Page<GearCollisionResponse> list(
+            @RequestParam(required = false) String status,
+            @RequestParam(required = false) String severity,
+            @RequestParam(required = false) String name,
+            @RequestParam(defaultValue = "48") int hours,
+            @RequestParam(defaultValue = "0") int page,
+            @RequestParam(defaultValue = "50") int size
+    ) {
+        return service.list(status, severity, name, hours,
+                PageRequest.of(page, size, Sort.by(Sort.Direction.DESC, "lastSeenAt")))
+                .map(GearCollisionResponse::from);
+    }
+
+    @GetMapping("/stats")
+    @RequirePermission(resource = RESOURCE, operation = "READ")
+    public GearCollisionStatsResponse stats(@RequestParam(defaultValue = "48") int hours) {
+        return service.stats(hours);
+    }
+
+    @GetMapping("/{id}")
+    @RequirePermission(resource = RESOURCE, operation = "READ")
+    public GearCollisionResponse get(@PathVariable Long id) {
+        return GearCollisionResponse.from(service.get(id));
+    }
+
+    @PostMapping("/{id}/resolve")
+    @RequirePermission(resource = RESOURCE, operation = "UPDATE")
+    public GearCollisionResponse resolve(
+            @PathVariable Long id,
+            @Valid @RequestBody GearCollisionResolveRequest req
+    ) {
+        return GearCollisionResponse.from(service.resolve(id, req));
+    }
+}

backend/src/main/java/gc/mda/kcg/domain/analysis/GearCollisionResolveRequest.java

@@ -0,0 +1,18 @@
+package gc.mda.kcg.domain.analysis;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.Pattern;
+
+/**
+ * gear_identity_collisions 분류(해결) 액션 요청.
+ *
+ * action: REVIEWED | CONFIRMED_ILLEGAL | FALSE_POSITIVE | REOPEN
+ * note  : 선택 (운영자 메모)
+ */
+public record GearCollisionResolveRequest(
+        @NotBlank
+        @Pattern(regexp = "REVIEWED|CONFIRMED_ILLEGAL|FALSE_POSITIVE|REOPEN")
+        String action,
+        String note
+) {
+}

backend/src/main/java/gc/mda/kcg/domain/analysis/GearCollisionResponse.java

@@ -0,0 +1,57 @@
+package gc.mda.kcg.domain.analysis;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * gear_identity_collisions 조회 응답 DTO.
+ */
+public record GearCollisionResponse(
+        Long id,
+        String name,
+        String mmsiLo,
+        String mmsiHi,
+        String parentName,
+        Long parentVesselId,
+        OffsetDateTime firstSeenAt,
+        OffsetDateTime lastSeenAt,
+        Integer coexistenceCount,
+        Integer swapCount,
+        BigDecimal maxDistanceKm,
+        BigDecimal lastLatLo,
+        BigDecimal lastLonLo,
+        BigDecimal lastLatHi,
+        BigDecimal lastLonHi,
+        String severity,
+        String status,
+        String resolutionNote,
+        List<Map<String, Object>> evidence,
+        OffsetDateTime updatedAt
+) {
+    public static GearCollisionResponse from(GearIdentityCollision e) {
+        return new GearCollisionResponse(
+                e.getId(),
+                e.getName(),
+                e.getMmsiLo(),
+                e.getMmsiHi(),
+                e.getParentName(),
+                e.getParentVesselId(),
+                e.getFirstSeenAt(),
+                e.getLastSeenAt(),
+                e.getCoexistenceCount(),
+                e.getSwapCount(),
+                e.getMaxDistanceKm(),
+                e.getLastLatLo(),
+                e.getLastLonLo(),
+                e.getLastLatHi(),
+                e.getLastLonHi(),
+                e.getSeverity(),
+                e.getStatus(),
+                e.getResolutionNote(),
+                e.getEvidence(),
+                e.getUpdatedAt()
+        );
+    }
+}

backend/src/main/java/gc/mda/kcg/domain/analysis/GearCollisionStatsResponse.java

@@ -0,0 +1,14 @@
+package gc.mda.kcg.domain.analysis;
+
+import java.util.Map;
+
+/**
+ * gear_identity_collisions status/severity 별 집계 응답.
+ */
+public record GearCollisionStatsResponse(
+        long total,
+        Map<String, Long> byStatus,
+        Map<String, Long> bySeverity,
+        int hours
+) {
+}

backend/src/main/java/gc/mda/kcg/domain/analysis/GearIdentityCollision.java

@@ -0,0 +1,99 @@
+package gc.mda.kcg.domain.analysis;
+
+import jakarta.persistence.*;
+import lombok.*;
+import org.hibernate.annotations.JdbcTypeCode;
+import org.hibernate.type.SqlTypes;
+
+import java.math.BigDecimal;
+import java.time.OffsetDateTime;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+/**
+ * gear_identity_collisions 엔티티 (GEAR_IDENTITY_COLLISION 탐지 패턴).
+ *
+ * 동일 어구 이름이 서로 다른 MMSI 로 같은 cycle 내 동시 송출되는 공존 이력.
+ * prediction 엔진이 5분 주기로 UPSERT, 백엔드는 조회 및 운영자 분류(status) 만 갱신.
+ */
+@Entity
+@Table(name = "gear_identity_collisions", schema = "kcg")
+@Getter
+@Setter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor
+@Builder
+public class GearIdentityCollision {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(name = "name", nullable = false, length = 200)
+    private String name;
+
+    @Column(name = "mmsi_lo", nullable = false, length = 20)
+    private String mmsiLo;
+
+    @Column(name = "mmsi_hi", nullable = false, length = 20)
+    private String mmsiHi;
+
+    @Column(name = "parent_name", length = 100)
+    private String parentName;
+
+    @Column(name = "parent_vessel_id")
+    private Long parentVesselId;
+
+    @Column(name = "first_seen_at", nullable = false)
+    private OffsetDateTime firstSeenAt;
+
+    @Column(name = "last_seen_at", nullable = false)
+    private OffsetDateTime lastSeenAt;
+
+    @Column(name = "coexistence_count", nullable = false)
+    private Integer coexistenceCount;
+
+    @Column(name = "swap_count", nullable = false)
+    private Integer swapCount;
+
+    @Column(name = "max_distance_km", precision = 8, scale = 2)
+    private BigDecimal maxDistanceKm;
+
+    @Column(name = "last_lat_lo", precision = 9, scale = 6)
+    private BigDecimal lastLatLo;
+
+    @Column(name = "last_lon_lo", precision = 10, scale = 6)
+    private BigDecimal lastLonLo;
+
+    @Column(name = "last_lat_hi", precision = 9, scale = 6)
+    private BigDecimal lastLatHi;
+
+    @Column(name = "last_lon_hi", precision = 10, scale = 6)
+    private BigDecimal lastLonHi;
+
+    @Column(name = "severity", nullable = false, length = 20)
+    private String severity;
+
+    @Column(name = "status", nullable = false, length = 30)
+    private String status;
+
+    @Column(name = "resolved_by")
+    private UUID resolvedBy;
+
+    @Column(name = "resolved_at")
+    private OffsetDateTime resolvedAt;
+
+    @Column(name = "resolution_note", columnDefinition = "text")
+    private String resolutionNote;
+
+    @JdbcTypeCode(SqlTypes.JSON)
+    @Column(name = "evidence", columnDefinition = "jsonb")
+    private List<Map<String, Object>> evidence;
+
+    @Column(name = "created_at", nullable = false, updatable = false)
+    private OffsetDateTime createdAt;
+
+    @Column(name = "updated_at", nullable = false)
+    private OffsetDateTime updatedAt;
+}

backend/src/main/java/gc/mda/kcg/domain/analysis/GearIdentityCollisionRepository.java

@@ -0,0 +1,41 @@
+package gc.mda.kcg.domain.analysis;
+
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
+import org.springframework.data.jpa.repository.Query;
+
+import java.time.OffsetDateTime;
+import java.util.List;
+
+public interface GearIdentityCollisionRepository
+        extends JpaRepository<GearIdentityCollision, Long>,
+                JpaSpecificationExecutor<GearIdentityCollision> {
+
+    Page<GearIdentityCollision> findAllByLastSeenAtAfterOrderByLastSeenAtDesc(
+            OffsetDateTime after, Pageable pageable);
+
+    /**
+     * status 별 카운트 집계 (hours 윈도우).
+     * 반환: [{status, count}, ...] — Object[] {String status, Long count}
+     */
+    @Query("""
+        SELECT g.status AS status, COUNT(g) AS cnt
+          FROM GearIdentityCollision g
+         WHERE g.lastSeenAt > :after
+         GROUP BY g.status
+        """)
+    List<Object[]> countByStatus(OffsetDateTime after);
+
+    /**
+     * severity 별 카운트 집계 (hours 윈도우).
+     */
+    @Query("""
+        SELECT g.severity AS severity, COUNT(g) AS cnt
+          FROM GearIdentityCollision g
+         WHERE g.lastSeenAt > :after
+         GROUP BY g.severity
+        """)
+    List<Object[]> countBySeverity(OffsetDateTime after);
+}

backend/src/main/java/gc/mda/kcg/domain/analysis/GearIdentityCollisionService.java

@@ -0,0 +1,133 @@
+package gc.mda.kcg.domain.analysis;
+
+import gc.mda.kcg.audit.annotation.Auditable;
+import gc.mda.kcg.auth.AuthPrincipal;
+import jakarta.persistence.EntityNotFoundException;
+import jakarta.persistence.criteria.Predicate;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.jpa.domain.Specification;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.OffsetDateTime;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * 어구 정체성 충돌(GEAR_IDENTITY_COLLISION) 조회/분류 서비스.
+ *
+ * 조회는 모두 {@link Transactional}(readOnly=true), 분류 액션은 {@link Auditable} 로
+ * 감사로그 기록. 상태 전이 화이트리스트는 REVIEWED / CONFIRMED_ILLEGAL / FALSE_POSITIVE / REOPEN.
+ */
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class GearIdentityCollisionService {
+
+    private static final String RESOURCE_TYPE = "GEAR_COLLISION";
+
+    private final GearIdentityCollisionRepository repository;
+
+    @Transactional(readOnly = true)
+    public Page<GearIdentityCollision> list(
+            String status,
+            String severity,
+            String name,
+            int hours,
+            Pageable pageable
+    ) {
+        OffsetDateTime after = OffsetDateTime.now().minusHours(Math.max(hours, 1));
+        Specification<GearIdentityCollision> spec = (root, query, cb) -> {
+            List<Predicate> preds = new ArrayList<>();
+            preds.add(cb.greaterThan(root.get("lastSeenAt"), after));
+            if (status != null && !status.isBlank()) {
+                preds.add(cb.equal(root.get("status"), status));
+            }
+            if (severity != null && !severity.isBlank()) {
+                preds.add(cb.equal(root.get("severity"), severity));
+            }
+            if (name != null && !name.isBlank()) {
+                preds.add(cb.like(root.get("name"), "%" + name + "%"));
+            }
+            return cb.and(preds.toArray(new Predicate[0]));
+        };
+        return repository.findAll(spec, pageable);
+    }
+
+    @Transactional(readOnly = true)
+    public GearIdentityCollision get(Long id) {
+        return repository.findById(id)
+                .orElseThrow(() -> new EntityNotFoundException("GEAR_COLLISION_NOT_FOUND: " + id));
+    }
+
+    @Transactional(readOnly = true)
+    public GearCollisionStatsResponse stats(int hours) {
+        OffsetDateTime after = OffsetDateTime.now().minusHours(Math.max(hours, 1));
+        Map<String, Long> byStatus = new HashMap<>();
+        long total = 0;
+        for (Object[] row : repository.countByStatus(after)) {
+            String s = (String) row[0];
+            long c = ((Number) row[1]).longValue();
+            byStatus.put(s, c);
+            total += c;
+        }
+        Map<String, Long> bySeverity = new HashMap<>();
+        for (Object[] row : repository.countBySeverity(after)) {
+            bySeverity.put((String) row[0], ((Number) row[1]).longValue());
+        }
+        return new GearCollisionStatsResponse(total, byStatus, bySeverity, hours);
+    }
+
+    @Auditable(action = "GEAR_COLLISION_RESOLVE", resourceType = RESOURCE_TYPE)
+    @Transactional
+    public GearIdentityCollision resolve(Long id, GearCollisionResolveRequest req) {
+        GearIdentityCollision row = repository.findById(id)
+                .orElseThrow(() -> new EntityNotFoundException("GEAR_COLLISION_NOT_FOUND: " + id));
+        AuthPrincipal principal = currentPrincipal();
+        OffsetDateTime now = OffsetDateTime.now();
+
+        switch (req.action().toUpperCase()) {
+            case "REVIEWED" -> {
+                row.setStatus("REVIEWED");
+                row.setResolvedBy(principal != null ? principal.getUserId() : null);
+                row.setResolvedAt(now);
+                row.setResolutionNote(req.note());
+            }
+            case "CONFIRMED_ILLEGAL" -> {
+                row.setStatus("CONFIRMED_ILLEGAL");
+                row.setResolvedBy(principal != null ? principal.getUserId() : null);
+                row.setResolvedAt(now);
+                row.setResolutionNote(req.note());
+            }
+            case "FALSE_POSITIVE" -> {
+                row.setStatus("FALSE_POSITIVE");
+                row.setResolvedBy(principal != null ? principal.getUserId() : null);
+                row.setResolvedAt(now);
+                row.setResolutionNote(req.note());
+            }
+            case "REOPEN" -> {
+                row.setStatus("OPEN");
+                row.setResolvedBy(null);
+                row.setResolvedAt(null);
+                row.setResolutionNote(req.note());
+            }
+            default -> throw new IllegalArgumentException("UNKNOWN_ACTION: " + req.action());
+        }
+        row.setUpdatedAt(now);
+        return repository.save(row);
+    }
+
+    private AuthPrincipal currentPrincipal() {
+        var auth = SecurityContextHolder.getContext().getAuthentication();
+        if (auth != null && auth.getPrincipal() instanceof AuthPrincipal p) {
+            return p;
+        }
+        return null;
+    }
+}

backend/src/main/resources/db/migration/V030__gear_identity_collision.sql

@@ -0,0 +1,90 @@
+-- ============================================================================
+-- V030: 어구 정체성 충돌(GEAR_IDENTITY_COLLISION) 탐지 패턴
+--   동일 어구 이름이 서로 다른 MMSI 로 같은 5분 사이클 내 동시 AIS 송출되는
+--   케이스를 독립 탐지 패턴으로 기록. 공존 이력·심각도·운영자 분류 상태를 보존한다.
+-- ============================================================================
+
+-- ──────────────────────────────────────────────────────────────────
+-- 1. 충돌 이력 테이블
+-- ──────────────────────────────────────────────────────────────────
+CREATE TABLE IF NOT EXISTS kcg.gear_identity_collisions (
+    id                   BIGSERIAL    PRIMARY KEY,
+    name                 VARCHAR(200) NOT NULL,                    -- 동일한 어구 이름
+    mmsi_lo              VARCHAR(20)  NOT NULL,                    -- 정렬된 쌍 (lo < hi)
+    mmsi_hi              VARCHAR(20)  NOT NULL,
+    parent_name          VARCHAR(100),
+    parent_vessel_id     BIGINT,                                   -- fleet_vessels.id
+    first_seen_at        TIMESTAMPTZ  NOT NULL,
+    last_seen_at         TIMESTAMPTZ  NOT NULL,
+    coexistence_count    INT          NOT NULL DEFAULT 1,          -- 동일 cycle 공존 누적
+    swap_count           INT          NOT NULL DEFAULT 0,          -- 시간차 스왑 누적(참고)
+    max_distance_km      NUMERIC(8,2),                             -- 양 위치 최대 거리
+    last_lat_lo          NUMERIC(9,6),
+    last_lon_lo          NUMERIC(10,6),
+    last_lat_hi          NUMERIC(9,6),
+    last_lon_hi          NUMERIC(10,6),
+    severity             VARCHAR(20)  NOT NULL DEFAULT 'MEDIUM',   -- CRITICAL/HIGH/MEDIUM/LOW
+    status               VARCHAR(30)  NOT NULL DEFAULT 'OPEN',     -- OPEN/REVIEWED/CONFIRMED_ILLEGAL/FALSE_POSITIVE
+    resolved_by          UUID,
+    resolved_at          TIMESTAMPTZ,
+    resolution_note      TEXT,
+    evidence             JSONB,                                    -- 최근 관측 요약
+    created_at           TIMESTAMPTZ  NOT NULL DEFAULT now(),
+    updated_at           TIMESTAMPTZ  NOT NULL DEFAULT now(),
+    CONSTRAINT gear_identity_collisions_pair_uk UNIQUE (name, mmsi_lo, mmsi_hi),
+    CONSTRAINT gear_identity_collisions_pair_ord CHECK (mmsi_lo < mmsi_hi)
+);
+
+CREATE INDEX IF NOT EXISTS idx_gic_status
+    ON kcg.gear_identity_collisions(status, last_seen_at DESC);
+CREATE INDEX IF NOT EXISTS idx_gic_severity
+    ON kcg.gear_identity_collisions(severity, last_seen_at DESC);
+CREATE INDEX IF NOT EXISTS idx_gic_parent
+    ON kcg.gear_identity_collisions(parent_vessel_id)
+    WHERE parent_vessel_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_gic_name
+    ON kcg.gear_identity_collisions(name);
+CREATE INDEX IF NOT EXISTS idx_gic_last_seen
+    ON kcg.gear_identity_collisions(last_seen_at DESC);
+
+COMMENT ON TABLE kcg.gear_identity_collisions IS
+    '동일 어구 이름이 서로 다른 MMSI 로 공존 송출되는 스푸핑 의심 패턴 (GEAR_IDENTITY_COLLISION).';
+
+-- ──────────────────────────────────────────────────────────────────
+-- 2. 권한 트리 / 메뉴 슬롯 (V024 이후 detection 그룹은 평탄화됨: parent_cd=NULL)
+-- ──────────────────────────────────────────────────────────────────
+INSERT INTO kcg.auth_perm_tree
+    (rsrc_cd, parent_cd, rsrc_nm, rsrc_level, sort_ord,
+     url_path, label_key, component_key, nav_sort, labels)
+VALUES
+    ('detection:gear-collision', NULL, '어구 정체성 충돌', 1, 40,
+     '/gear-collision', 'nav.gearCollision',
+     'features/detection/GearCollisionDetection', 950,
+     '{"ko":"어구 정체성 충돌","en":"Gear Identity Collision"}'::jsonb)
+ON CONFLICT (rsrc_cd) DO NOTHING;
+
+-- ──────────────────────────────────────────────────────────────────
+-- 3. 권한 부여
+--   ADMIN  : 전체 op (READ/CREATE/UPDATE/DELETE/EXPORT)
+--   OPERATOR: READ + UPDATE (분류 액션)
+--   VIEWER/ANALYST/FIELD: READ
+-- ──────────────────────────────────────────────────────────────────
+INSERT INTO kcg.auth_perm(role_sn, rsrc_cd, oper_cd, grant_yn)
+SELECT r.role_sn, 'detection:gear-collision', op.oper_cd, 'Y'
+FROM kcg.auth_role r
+CROSS JOIN (VALUES ('READ'), ('CREATE'), ('UPDATE'), ('DELETE'), ('EXPORT')) AS op(oper_cd)
+WHERE r.role_cd = 'ADMIN'
+ON CONFLICT (role_sn, rsrc_cd, oper_cd) DO NOTHING;
+
+INSERT INTO kcg.auth_perm(role_sn, rsrc_cd, oper_cd, grant_yn)
+SELECT r.role_sn, 'detection:gear-collision', op.oper_cd, 'Y'
+FROM kcg.auth_role r
+CROSS JOIN (VALUES ('READ'), ('UPDATE')) AS op(oper_cd)
+WHERE r.role_cd = 'OPERATOR'
+ON CONFLICT (role_sn, rsrc_cd, oper_cd) DO NOTHING;
+
+INSERT INTO kcg.auth_perm(role_sn, rsrc_cd, oper_cd, grant_yn)
+SELECT r.role_sn, 'detection:gear-collision', 'READ', 'Y'
+FROM kcg.auth_role r
+WHERE r.role_cd IN ('VIEWER', 'ANALYST', 'FIELD')
+ON CONFLICT (role_sn, rsrc_cd, oper_cd) DO NOTHING;

frontend/src/app/componentRegistry.ts

@@ -39,6 +39,9 @@ export const COMPONENT_REGISTRY: Record<string, LazyComponent> = {
   'features/detection/ChinaFishing': lazy(() =>
     import('@features/detection').then((m) => ({ default: m.ChinaFishing })),
   ),
+  'features/detection/GearCollisionDetection': lazy(() =>
+    import('@features/detection').then((m) => ({ default: m.GearCollisionDetection })),
+  ),
   // ── 단속·이벤트 ──
   'features/enforcement/EnforcementHistory': lazy(() =>
     import('@features/enforcement').then((m) => ({ default: m.EnforcementHistory })),

frontend/src/features/detection/GearCollisionDetection.tsx

@@ -0,0 +1,427 @@
+import { useCallback, useEffect, useMemo, useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import { AlertOctagon, RefreshCw } from 'lucide-react';
+
+import { PageContainer, PageHeader, Section } from '@shared/components/layout';
+import { Badge } from '@shared/components/ui/badge';
+import { Button } from '@shared/components/ui/button';
+import { Input } from '@shared/components/ui/input';
+import { Select } from '@shared/components/ui/select';
+import { Textarea } from '@shared/components/ui/textarea';
+import { Card, CardContent } from '@shared/components/ui/card';
+import { DataTable, type DataColumn } from '@shared/components/common/DataTable';
+
+import { formatDateTime } from '@shared/utils/dateFormat';
+import { getAlertLevelIntent, getAlertLevelLabel } from '@shared/constants/alertLevels';
+import {
+  GEAR_COLLISION_STATUS_ORDER,
+  getGearCollisionStatusIntent,
+  getGearCollisionStatusLabel,
+} from '@shared/constants/gearCollisionStatuses';
+import {
+  getGearCollisionStats,
+  listGearCollisions,
+  resolveGearCollision,
+  type GearCollision,
+  type GearCollisionResolveAction,
+  type GearCollisionStats,
+} from '@/services/gearCollisionApi';
+import { useSettingsStore } from '@stores/settingsStore';
+
+/**
+ * 어구 정체성 충돌(GEAR_IDENTITY_COLLISION) 탐지 페이지.
+ *
+ * 동일 어구 이름이 서로 다른 MMSI 로 같은 cycle 에 공존 송출되는 경우를 목록화하고
+ * 운영자가 REVIEWED / CONFIRMED_ILLEGAL / FALSE_POSITIVE 로 분류할 수 있게 한다.
+ */
+
+type SeverityCode = 'CRITICAL' | 'HIGH' | 'MEDIUM' | 'LOW';
+const SEVERITY_OPTIONS: SeverityCode[] = ['CRITICAL', 'HIGH', 'MEDIUM', 'LOW'];
+const DEFAULT_HOURS = 48;
+
+export function GearCollisionDetection() {
+  const { t } = useTranslation('detection');
+  const { t: tc } = useTranslation('common');
+  const lang = useSettingsStore((s) => s.language) as 'ko' | 'en';
+
+  const [rows, setRows] = useState<GearCollision[]>([]);
+  const [stats, setStats] = useState<GearCollisionStats | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState('');
+  const [statusFilter, setStatusFilter] = useState<string>('');
+  const [severityFilter, setSeverityFilter] = useState<string>('');
+  const [nameFilter, setNameFilter] = useState<string>('');
+  const [selected, setSelected] = useState<GearCollision | null>(null);
+  const [resolveAction, setResolveAction] = useState<GearCollisionResolveAction>('REVIEWED');
+  const [resolveNote, setResolveNote] = useState('');
+  const [resolving, setResolving] = useState(false);
+
+  const loadData = useCallback(async () => {
+    setLoading(true);
+    setError('');
+    try {
+      const [page, summary] = await Promise.all([
+        listGearCollisions({
+          status: statusFilter || undefined,
+          severity: severityFilter || undefined,
+          name: nameFilter || undefined,
+          hours: DEFAULT_HOURS,
+          size: 200,
+        }),
+        getGearCollisionStats(DEFAULT_HOURS),
+      ]);
+      setRows(page.content);
+      setStats(summary);
+    } catch (e: unknown) {
+      setError(e instanceof Error ? e.message : t('gearCollision.error.loadFailed'));
+    } finally {
+      setLoading(false);
+    }
+  }, [statusFilter, severityFilter, nameFilter, t]);
+
+  useEffect(() => { loadData(); }, [loadData]);
+
+  // 선택된 row 와 현재 목록의 동기화
+  const syncedSelected = useMemo(
+    () => selected ? rows.find((r) => r.id === selected.id) ?? selected : null,
+    [rows, selected],
+  );
+
+  const cols: DataColumn<GearCollision & Record<string, unknown>>[] = useMemo(() => [
+    {
+      key: 'name', label: t('gearCollision.columns.name'), minWidth: '120px', sortable: true,
+      render: (v) => <span className="text-cyan-600 dark:text-cyan-400 font-medium">{v as string}</span>,
+    },
+    {
+      key: 'mmsiLo', label: t('gearCollision.columns.mmsiPair'), minWidth: '160px',
+      render: (_, row) => (
+        <span className="font-mono text-[10px] text-label">
+          {row.mmsiLo} ↔ {row.mmsiHi}
+        </span>
+      ),
+    },
+    {
+      key: 'parentName', label: t('gearCollision.columns.parentName'), minWidth: '110px',
+      render: (v) => <span className="text-hint text-[10px]">{(v as string) || '-'}</span>,
+    },
+    {
+      key: 'coexistenceCount', label: t('gearCollision.columns.coexistenceCount'),
+      width: '90px', align: 'center', sortable: true,
+      render: (v) => <span className="font-mono text-label">{v as number}</span>,
+    },
+    {
+      key: 'maxDistanceKm', label: t('gearCollision.columns.maxDistance'),
+      width: '110px', align: 'right', sortable: true,
+      render: (v) => {
+        const n = typeof v === 'number' ? v : Number(v ?? 0);
+        return <span className="font-mono text-[10px] text-label">{n.toFixed(2)}</span>;
+      },
+    },
+    {
+      key: 'severity', label: t('gearCollision.columns.severity'),
+      width: '90px', align: 'center', sortable: true,
+      render: (v) => (
+        <Badge intent={getAlertLevelIntent(v as string)} size="sm">
+          {getAlertLevelLabel(v as string, tc, lang)}
+        </Badge>
+      ),
+    },
+    {
+      key: 'status', label: t('gearCollision.columns.status'),
+      width: '110px', align: 'center', sortable: true,
+      render: (v) => (
+        <Badge intent={getGearCollisionStatusIntent(v as string)} size="sm">
+          {getGearCollisionStatusLabel(v as string, t, lang)}
+        </Badge>
+      ),
+    },
+    {
+      key: 'lastSeenAt', label: t('gearCollision.columns.lastSeen'),
+      width: '130px', sortable: true,
+      render: (v) => (
+        <span className="text-muted-foreground text-[10px]">{formatDateTime(v as string)}</span>
+      ),
+    },
+  ], [t, tc, lang]);
+
+  const handleResolve = useCallback(async () => {
+    if (!syncedSelected) return;
+    const ok = window.confirm(t('gearCollision.resolve.confirmPrompt'));
+    if (!ok) return;
+    setResolving(true);
+    try {
+      const updated = await resolveGearCollision(syncedSelected.id, {
+        action: resolveAction,
+        note: resolveNote || undefined,
+      });
+      setSelected(updated);
+      setResolveNote('');
+      await loadData();
+    } catch (e: unknown) {
+      setError(e instanceof Error ? e.message : t('gearCollision.error.resolveFailed'));
+    } finally {
+      setResolving(false);
+    }
+  }, [syncedSelected, resolveAction, resolveNote, loadData, t]);
+
+  const statusCount = (code: string) => stats?.byStatus?.[code] ?? 0;
+
+  return (
+    <PageContainer>
+      <PageHeader
+        icon={AlertOctagon}
+        iconColor="text-orange-600 dark:text-orange-400"
+        title={t('gearCollision.title')}
+        description={t('gearCollision.desc')}
+        actions={
+          <Button
+            variant="outline"
+            size="sm"
+            onClick={loadData}
+            disabled={loading}
+            icon={<RefreshCw className="w-3.5 h-3.5" />}
+          >
+            {t('gearCollision.list.refresh')}
+          </Button>
+        }
+      />
+
+      {error && (
+        <Card variant="default">
+          <CardContent className="text-destructive text-xs py-2">{error}</CardContent>
+        </Card>
+      )}
+
+      <Section title={t('gearCollision.stats.title')}>
+        <div className="grid grid-cols-2 md:grid-cols-5 gap-2">
+          <StatCard label={t('gearCollision.stats.total')} value={stats?.total ?? 0} />
+          <StatCard
+            label={t('gearCollision.stats.open')}
+            value={statusCount('OPEN')}
+            intent="warning"
+          />
+          <StatCard
+            label={t('gearCollision.stats.reviewed')}
+            value={statusCount('REVIEWED')}
+            intent="info"
+          />
+          <StatCard
+            label={t('gearCollision.stats.confirmed')}
+            value={statusCount('CONFIRMED_ILLEGAL')}
+            intent="critical"
+          />
+          <StatCard
+            label={t('gearCollision.stats.falsePositive')}
+            value={statusCount('FALSE_POSITIVE')}
+            intent="muted"
+          />
+        </div>
+      </Section>
+
+      <Section title={t('gearCollision.list.title')}>
+        <div className="grid grid-cols-1 md:grid-cols-4 gap-2 mb-3">
+          <Select
+            aria-label={t('gearCollision.filters.status')}
+            value={statusFilter}
+            onChange={(e) => setStatusFilter(e.target.value)}
+          >
+            <option value="">{t('gearCollision.filters.allStatus')}</option>
+            {GEAR_COLLISION_STATUS_ORDER.map((s) => (
+              <option key={s} value={s}>{getGearCollisionStatusLabel(s, t, lang)}</option>
+            ))}
+          </Select>
+          <Select
+            aria-label={t('gearCollision.filters.severity')}
+            value={severityFilter}
+            onChange={(e) => setSeverityFilter(e.target.value)}
+          >
+            <option value="">{t('gearCollision.filters.allSeverity')}</option>
+            {SEVERITY_OPTIONS.map((sv) => (
+              <option key={sv} value={sv}>{getAlertLevelLabel(sv, tc, lang)}</option>
+            ))}
+          </Select>
+          <Input
+            aria-label={t('gearCollision.filters.name')}
+            placeholder={t('gearCollision.filters.name')}
+            value={nameFilter}
+            onChange={(e) => setNameFilter(e.target.value)}
+          />
+          <div className="flex items-center justify-end">
+            <Badge intent="info" size="sm">
+              {t('gearCollision.filters.hours')} · {DEFAULT_HOURS}h
+            </Badge>
+          </div>
+        </div>
+
+        {rows.length === 0 && !loading ? (
+          <p className="text-hint text-xs py-4 text-center">
+            {t('gearCollision.list.empty', { hours: DEFAULT_HOURS })}
+          </p>
+        ) : (
+          <DataTable
+            data={rows as (GearCollision & Record<string, unknown>)[]}
+            columns={cols}
+            pageSize={20}
+            showSearch={false}
+            showExport={false}
+            showPrint={false}
+            onRowClick={(row) => setSelected(row as GearCollision)}
+          />
+        )}
+      </Section>
+
+      {syncedSelected && (
+        <Section title={t('gearCollision.detail.title')}>
+          <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
+            <div className="space-y-1.5 text-xs">
+              <DetailRow label={t('gearCollision.columns.name')} value={syncedSelected.name} mono />
+              <DetailRow
+                label={t('gearCollision.columns.mmsiPair')}
+                value={`${syncedSelected.mmsiLo} ↔ ${syncedSelected.mmsiHi}`}
+                mono
+              />
+              <DetailRow
+                label={t('gearCollision.columns.parentName')}
+                value={syncedSelected.parentName ?? '-'}
+              />
+              <DetailRow
+                label={t('gearCollision.detail.firstSeenAt')}
+                value={formatDateTime(syncedSelected.firstSeenAt)}
+              />
+              <DetailRow
+                label={t('gearCollision.detail.lastSeenAt')}
+                value={formatDateTime(syncedSelected.lastSeenAt)}
+              />
+              <DetailRow
+                label={t('gearCollision.columns.coexistenceCount')}
+                value={String(syncedSelected.coexistenceCount)}
+              />
+              <DetailRow
+                label={t('gearCollision.detail.swapCount')}
+                value={String(syncedSelected.swapCount)}
+              />
+              <DetailRow
+                label={t('gearCollision.columns.maxDistance')}
+                value={
+                  syncedSelected.maxDistanceKm != null
+                    ? Number(syncedSelected.maxDistanceKm).toFixed(2)
+                    : '-'
+                }
+              />
+            </div>
+            <div className="space-y-2">
+              <div className="flex items-center gap-2">
+                <span className="text-xs text-label">
+                  {t('gearCollision.columns.severity')}:
+                </span>
+                <Badge intent={getAlertLevelIntent(syncedSelected.severity)} size="sm">
+                  {getAlertLevelLabel(syncedSelected.severity, tc, lang)}
+                </Badge>
+                <span className="text-xs text-label ml-3">
+                  {t('gearCollision.columns.status')}:
+                </span>
+                <Badge intent={getGearCollisionStatusIntent(syncedSelected.status)} size="sm">
+                  {getGearCollisionStatusLabel(syncedSelected.status, t, lang)}
+                </Badge>
+              </div>
+              {syncedSelected.resolutionNote && (
+                <p className="text-xs text-hint border-l-2 border-border pl-2">
+                  {syncedSelected.resolutionNote}
+                </p>
+              )}
+              <div className="space-y-1.5">
+                <label
+                  htmlFor="gc-resolve-action"
+                  className="block text-xs text-label"
+                >
+                  {t('gearCollision.resolve.title')}
+                </label>
+                <Select
+                  id="gc-resolve-action"
+                  aria-label={t('gearCollision.resolve.title')}
+                  value={resolveAction}
+                  onChange={(e) => setResolveAction(e.target.value as GearCollisionResolveAction)}
+                >
+                  <option value="REVIEWED">{t('gearCollision.resolve.reviewed')}</option>
+                  <option value="CONFIRMED_ILLEGAL">
+                    {t('gearCollision.resolve.confirmedIllegal')}
+                  </option>
+                  <option value="FALSE_POSITIVE">
+                    {t('gearCollision.resolve.falsePositive')}
+                  </option>
+                  <option value="REOPEN">{t('gearCollision.resolve.reopen')}</option>
+                </Select>
+                <Textarea
+                  aria-label={t('gearCollision.resolve.note')}
+                  placeholder={t('gearCollision.resolve.notePlaceholder')}
+                  value={resolveNote}
+                  onChange={(e) => setResolveNote(e.target.value)}
+                  rows={3}
+                />
+                <div className="flex gap-2 justify-end">
+                  <Button
+                    variant="ghost"
+                    size="sm"
+                    onClick={() => { setSelected(null); setResolveNote(''); }}
+                  >
+                    {t('gearCollision.resolve.cancel')}
+                  </Button>
+                  <Button
+                    variant="primary"
+                    size="sm"
+                    onClick={handleResolve}
+                    disabled={resolving}
+                  >
+                    {t('gearCollision.resolve.submit')}
+                  </Button>
+                </div>
+              </div>
+            </div>
+          </div>
+        </Section>
+      )}
+    </PageContainer>
+  );
+}
+
+// ─── 내부 컴포넌트 ─────────────
+
+interface StatCardProps {
+  label: string;
+  value: number;
+  intent?: 'warning' | 'info' | 'critical' | 'muted';
+}
+
+function StatCard({ label, value, intent }: StatCardProps) {
+  return (
+    <Card variant="default">
+      <CardContent className="py-3 flex flex-col items-center gap-1">
+        <span className="text-[10px] text-hint">{label}</span>
+        {intent ? (
+          <Badge intent={intent} size="md">
+            {value}
+          </Badge>
+        ) : (
+          <span className="text-lg font-bold text-heading">{value}</span>
+        )}
+      </CardContent>
+    </Card>
+  );
+}
+
+interface DetailRowProps {
+  label: string;
+  value: string;
+  mono?: boolean;
+}
+
+function DetailRow({ label, value, mono }: DetailRowProps) {
+  return (
+    <div className="flex items-center gap-2">
+      <span className="text-hint w-24 shrink-0">{label}</span>
+      <span className={mono ? 'font-mono text-label' : 'text-label'}>{value}</span>
+    </div>
+  );
+}
+
+export default GearCollisionDetection;

frontend/src/features/detection/index.ts

@@ -2,3 +2,4 @@ export { DarkVesselDetection } from './DarkVesselDetection';
 export { GearDetection } from './GearDetection';
 export { ChinaFishing } from './ChinaFishing';
 export { GearIdentification } from './GearIdentification';
+export { GearCollisionDetection } from './GearCollisionDetection';

frontend/src/lib/i18n/locales/en/common.json

@@ -8,6 +8,7 @@
     "darkVessel": "Dark Vessel",
     "gearDetection": "Gear Detection",
     "chinaFishing": "Chinese Vessel",
+    "gearCollision": "Gear Collision",
     "patrolRoute": "Patrol Route",
     "fleetOptimization": "Fleet Optimize",
     "enforcementHistory": "History",

frontend/src/lib/i18n/locales/en/detection.json

@@ -14,5 +14,77 @@
   "gearId": {
     "title": "Gear Identification",
     "desc": "SFR-10 | AI-based gear origin & type automatic identification"
+  },
+  "gearCollision": {
+    "title": "Gear Identity Collision",
+    "desc": "Same gear name broadcasting from multiple MMSIs in the same cycle — gear duplication / spoofing suspicion",
+    "stats": {
+      "title": "Overview",
+      "total": "Total",
+      "open": "Open",
+      "reviewed": "Reviewed",
+      "confirmed": "Confirmed Illegal",
+      "falsePositive": "False Positive"
+    },
+    "list": {
+      "title": "Collision Log",
+      "empty": "No collisions detected in the last {{hours}} hours.",
+      "refresh": "Refresh"
+    },
+    "columns": {
+      "name": "Gear Name",
+      "mmsiPair": "MMSI Pair",
+      "parentName": "Parent Vessel (est.)",
+      "coexistenceCount": "Coexistence",
+      "maxDistance": "Max Distance (km)",
+      "severity": "Severity",
+      "status": "Status",
+      "lastSeen": "Last Seen",
+      "actions": "Actions"
+    },
+    "filters": {
+      "status": "Status",
+      "severity": "Severity",
+      "name": "Search by name",
+      "hours": "Window (hours)",
+      "allStatus": "All statuses",
+      "allSeverity": "All severities"
+    },
+    "detail": {
+      "title": "Collision Detail",
+      "evidence": "Observations",
+      "trajectoryCompare": "Trajectory Compare",
+      "firstSeenAt": "First Seen",
+      "lastSeenAt": "Last Seen",
+      "swapCount": "Swap Count"
+    },
+    "resolve": {
+      "title": "Operator Review",
+      "reviewed": "Mark as Reviewed",
+      "confirmedIllegal": "Confirm Illegal",
+      "falsePositive": "Mark False Positive",
+      "reopen": "Reopen",
+      "note": "Note",
+      "notePlaceholder": "Record rationale or supporting evidence",
+      "submit": "Save",
+      "cancel": "Cancel",
+      "confirmPrompt": "Update status to the selected classification. Continue?"
+    },
+    "status": {
+      "open": "Open",
+      "reviewed": "Reviewed",
+      "confirmedIllegal": "Confirmed Illegal",
+      "falsePositive": "False Positive"
+    },
+    "severity": {
+      "CRITICAL": "Critical",
+      "HIGH": "High",
+      "MEDIUM": "Medium",
+      "LOW": "Low"
+    },
+    "error": {
+      "loadFailed": "Failed to load collisions",
+      "resolveFailed": "Failed to save classification"
+    }
   }
 }

frontend/src/lib/i18n/locales/ko/common.json

@@ -8,6 +8,7 @@
     "darkVessel": "다크베셀 탐지",
     "gearDetection": "어구 탐지",
     "chinaFishing": "중국어선 분석",
+    "gearCollision": "어구 정체성 충돌",
     "patrolRoute": "순찰경로 추천",
     "fleetOptimization": "다함정 최적화",
     "enforcementHistory": "단속 이력",

frontend/src/lib/i18n/locales/ko/detection.json

@@ -14,5 +14,77 @@
   "gearId": {
     "title": "어구 식별 분석",
     "desc": "SFR-10 | AI 기반 어구 원산지·유형 자동 식별 및 판정"
+  },
+  "gearCollision": {
+    "title": "어구 정체성 충돌 탐지",
+    "desc": "동일 어구 이름이 서로 다른 MMSI 로 같은 사이클에 동시 송출되는 공존 패턴 — 어구 복제/스푸핑 의심",
+    "stats": {
+      "title": "현황 요약",
+      "total": "전체",
+      "open": "미검토",
+      "reviewed": "검토됨",
+      "confirmed": "불법 확정",
+      "falsePositive": "오탐"
+    },
+    "list": {
+      "title": "충돌 이력",
+      "empty": "최근 {{hours}}시간 내 감지된 충돌이 없습니다.",
+      "refresh": "새로고침"
+    },
+    "columns": {
+      "name": "어구명",
+      "mmsiPair": "MMSI 쌍",
+      "parentName": "추정 모선",
+      "coexistenceCount": "공존 횟수",
+      "maxDistance": "최대 거리(km)",
+      "severity": "심각도",
+      "status": "상태",
+      "lastSeen": "마지막 감지",
+      "actions": "액션"
+    },
+    "filters": {
+      "status": "상태",
+      "severity": "심각도",
+      "name": "어구명 검색",
+      "hours": "조회 기간(시간)",
+      "allStatus": "전체 상태",
+      "allSeverity": "전체 심각도"
+    },
+    "detail": {
+      "title": "공존 상세",
+      "evidence": "관측 이력",
+      "trajectoryCompare": "궤적 비교",
+      "firstSeenAt": "최초 감지",
+      "lastSeenAt": "마지막 감지",
+      "swapCount": "교체 누적"
+    },
+    "resolve": {
+      "title": "운영자 분류",
+      "reviewed": "검토 완료",
+      "confirmedIllegal": "불법으로 확정",
+      "falsePositive": "오탐으로 분류",
+      "reopen": "재오픈",
+      "note": "판정 메모",
+      "notePlaceholder": "분류 사유·추가 증거 등을 기록하세요",
+      "submit": "저장",
+      "cancel": "취소",
+      "confirmPrompt": "선택한 분류로 상태를 갱신합니다. 계속할까요?"
+    },
+    "status": {
+      "open": "미검토",
+      "reviewed": "검토됨",
+      "confirmedIllegal": "불법 확정",
+      "falsePositive": "오탐"
+    },
+    "severity": {
+      "CRITICAL": "매우 심각",
+      "HIGH": "심각",
+      "MEDIUM": "주의",
+      "LOW": "경미"
+    },
+    "error": {
+      "loadFailed": "충돌 목록을 불러오지 못했습니다",
+      "resolveFailed": "분류 저장에 실패했습니다"
+    }
   }
 }

frontend/src/services/gearCollisionApi.ts

@@ -0,0 +1,114 @@
+/**
+ * gear_identity_collisions 조회 + 분류 액션 API 서비스.
+ * 백엔드 /api/analysis/gear-collisions 연동.
+ */
+
+import type { AnalysisPageResponse } from './analysisApi';
+
+const API_BASE = import.meta.env.VITE_API_URL ?? '/api';
+
+// ─── DTO (백엔드 GearCollisionResponse 1:1 매핑) ─────────────
+
+export interface GearCollision {
+  id: number;
+  name: string;
+  mmsiLo: string;
+  mmsiHi: string;
+  parentName: string | null;
+  parentVesselId: number | null;
+  firstSeenAt: string;
+  lastSeenAt: string;
+  coexistenceCount: number;
+  swapCount: number;
+  maxDistanceKm: number | null;
+  lastLatLo: number | null;
+  lastLonLo: number | null;
+  lastLatHi: number | null;
+  lastLonHi: number | null;
+  severity: 'CRITICAL' | 'HIGH' | 'MEDIUM' | 'LOW' | string;
+  status: 'OPEN' | 'REVIEWED' | 'CONFIRMED_ILLEGAL' | 'FALSE_POSITIVE' | string;
+  resolutionNote: string | null;
+  evidence: Array<Record<string, unknown>> | null;
+  updatedAt: string;
+}
+
+export interface GearCollisionStats {
+  total: number;
+  byStatus: Record<string, number>;
+  bySeverity: Record<string, number>;
+  hours: number;
+}
+
+export type GearCollisionResolveAction =
+  | 'REVIEWED'
+  | 'CONFIRMED_ILLEGAL'
+  | 'FALSE_POSITIVE'
+  | 'REOPEN';
+
+export interface GearCollisionResolveRequest {
+  action: GearCollisionResolveAction;
+  note?: string;
+}
+
+// ─── 내부 헬퍼 ─────────────
+
+function buildQuery(params: Record<string, unknown>): string {
+  const qs = new URLSearchParams();
+  for (const [k, v] of Object.entries(params)) {
+    if (v === undefined || v === null || v === '') continue;
+    qs.set(k, String(v));
+  }
+  const s = qs.toString();
+  return s ? `?${s}` : '';
+}
+
+async function apiGet<T>(path: string, params: Record<string, unknown> = {}): Promise<T> {
+  const res = await fetch(`${API_BASE}${path}${buildQuery(params)}`, { credentials: 'include' });
+  if (!res.ok) throw new Error(`API error: ${res.status}`);
+  return res.json();
+}
+
+async function apiPost<T>(path: string, body: unknown): Promise<T> {
+  const res = await fetch(`${API_BASE}${path}`, {
+    method: 'POST',
+    credentials: 'include',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(body),
+  });
+  if (!res.ok) throw new Error(`API error: ${res.status}`);
+  return res.json();
+}
+
+// ─── 공개 함수 ─────────────
+
+/** 어구 정체성 충돌 목록 조회 (필터 + 페이징). */
+export function listGearCollisions(params?: {
+  status?: string;
+  severity?: string;
+  name?: string;
+  hours?: number;
+  page?: number;
+  size?: number;
+}): Promise<AnalysisPageResponse<GearCollision>> {
+  return apiGet('/analysis/gear-collisions', {
+    hours: 48, page: 0, size: 50, ...params,
+  });
+}
+
+/** status/severity 집계 */
+export function getGearCollisionStats(hours = 48): Promise<GearCollisionStats> {
+  return apiGet('/analysis/gear-collisions/stats', { hours });
+}
+
+/** 단건 상세 조회 */
+export function getGearCollision(id: number): Promise<GearCollision> {
+  return apiGet(`/analysis/gear-collisions/${id}`);
+}
+
+/** 운영자 분류 액션 */
+export function resolveGearCollision(
+  id: number,
+  body: GearCollisionResolveRequest,
+): Promise<GearCollision> {
+  return apiPost(`/analysis/gear-collisions/${id}/resolve`, body);
+}

frontend/src/shared/constants/catalogRegistry.ts

@@ -45,6 +45,7 @@ import { ZONE_CODES } from './zoneCodes';
 import { GEAR_VIOLATION_CODES } from './gearViolationCodes';
 import { VESSEL_TYPES } from './vesselTypes';
 import { PERFORMANCE_STATUS_META } from './performanceStatus';
+import { GEAR_COLLISION_STATUSES } from './gearCollisionStatuses';
 
 /**
  * 카탈로그 공통 메타 — 쇼케이스 렌더와 UI 일관성을 위한 최소 스키마
@@ -337,6 +338,15 @@ export const CATALOG_REGISTRY: CatalogEntry[] = [
     source: 'admin 성능·데이터 보관·모델 검증 공통',
     items: PERFORMANCE_STATUS_META,
   },
+  {
+    id: 'gear-collision-status',
+    showcaseId: 'TRK-CAT-gear-collision-status',
+    titleKo: '어구 정체성 충돌 상태',
+    titleEn: 'Gear Identity Collision Status',
+    description: 'OPEN / REVIEWED / CONFIRMED_ILLEGAL / FALSE_POSITIVE',
+    source: 'backend gear_identity_collisions.status (V030)',
+    items: GEAR_COLLISION_STATUSES,
+  },
 ];
 
 /** ID로 특정 카탈로그 조회 */

frontend/src/shared/constants/gearCollisionStatuses.ts

@@ -0,0 +1,74 @@
+/**
+ * 어구 정체성 충돌(GEAR_IDENTITY_COLLISION) 운영자 분류 상태 카탈로그
+ *
+ * SSOT: backend GearIdentityCollision.status 컬럼 (V030 마이그레이션)
+ * 사용처: GearCollisionDetection 페이지 필터/테이블 Badge
+ */
+
+import type { BadgeIntent } from '@lib/theme/variants';
+
+export type GearCollisionStatus =
+  | 'OPEN'                // 신규 탐지 (미검토)
+  | 'REVIEWED'            // 검토됨 (확정 보류)
+  | 'CONFIRMED_ILLEGAL'   // 불법 확정
+  | 'FALSE_POSITIVE';     // 오탐 처리
+
+export interface GearCollisionStatusMeta {
+  code: GearCollisionStatus;
+  i18nKey: string;
+  fallback: { ko: string; en: string };
+  intent: BadgeIntent;
+}
+
+export const GEAR_COLLISION_STATUSES: Record<GearCollisionStatus, GearCollisionStatusMeta> = {
+  OPEN: {
+    code: 'OPEN',
+    i18nKey: 'gearCollision.status.open',
+    fallback: { ko: '미검토', en: 'Open' },
+    intent: 'warning',
+  },
+  REVIEWED: {
+    code: 'REVIEWED',
+    i18nKey: 'gearCollision.status.reviewed',
+    fallback: { ko: '검토됨', en: 'Reviewed' },
+    intent: 'info',
+  },
+  CONFIRMED_ILLEGAL: {
+    code: 'CONFIRMED_ILLEGAL',
+    i18nKey: 'gearCollision.status.confirmedIllegal',
+    fallback: { ko: '불법 확정', en: 'Confirmed Illegal' },
+    intent: 'critical',
+  },
+  FALSE_POSITIVE: {
+    code: 'FALSE_POSITIVE',
+    i18nKey: 'gearCollision.status.falsePositive',
+    fallback: { ko: '오탐', en: 'False Positive' },
+    intent: 'muted',
+  },
+};
+
+export function getGearCollisionStatusMeta(s: string): GearCollisionStatusMeta | undefined {
+  return GEAR_COLLISION_STATUSES[s as GearCollisionStatus];
+}
+
+export function getGearCollisionStatusIntent(s: string): BadgeIntent {
+  return getGearCollisionStatusMeta(s)?.intent ?? 'muted';
+}
+
+export function getGearCollisionStatusLabel(
+  s: string,
+  t: (key: string, opts?: Record<string, unknown>) => string,
+  lang: 'ko' | 'en' = 'ko',
+): string {
+  const meta = getGearCollisionStatusMeta(s);
+  if (!meta) return s;
+  const translated = t(meta.i18nKey, { defaultValue: '' });
+  return translated || meta.fallback[lang];
+}
+
+export const GEAR_COLLISION_STATUS_ORDER: GearCollisionStatus[] = [
+  'OPEN',
+  'REVIEWED',
+  'CONFIRMED_ILLEGAL',
+  'FALSE_POSITIVE',
+];

prediction/algorithms/gear_identity.py

@@ -0,0 +1,157 @@
+"""
+어구 정체성 충돌(GEAR_IDENTITY_COLLISION) 탐지 알고리즘.
+
+동일 어구 이름이 서로 다른 MMSI 로 같은 5분 사이클 내 동시 AIS 송출되는 케이스를
+스푸핑/복제 의심 패턴으로 탐지한다. fleet_tracker.track_gear_identity() 루프 진입
+전에 사이클 단위로 사전 집계하는 데 사용된다.
+"""
+from datetime import datetime
+from itertools import combinations
+from typing import Optional
+
+from algorithms.location import haversine_nm
+
+# ──────────────────────────────────────────────────────────────────
+# 공존 판정 · 심각도 임계
+# ──────────────────────────────────────────────────────────────────
+MIN_COEXISTENCE_GROUP = 2          # 같은 이름에 MMSI 2개 이상
+IMPOSSIBLE_SPEED_KTS = 60.0        # 두 위치 이동에 필요한 속도가 이보다 크면 물리 불가능
+CRITICAL_DISTANCE_KM = 50.0        # 단발이라도 이 거리 이상이면 즉시 CRITICAL
+HIGH_DISTANCE_KM = 10.0            # HIGH 기준 거리
+CRITICAL_COEXISTENCE_COUNT = 3     # 누적 공존 N회 이상이면 CRITICAL 승격
+HIGH_COEXISTENCE_COUNT = 2         # 누적 공존 N회 이상이면 HIGH
+NM_TO_KM = 1.852                   # 1 nautical mile = 1.852 km
+
+
+def detect_gear_name_collisions(
+    gear_signals: list[dict],
+    now: datetime,
+) -> list[dict]:
+    """동일 이름 · 다중 MMSI 공존 세트 추출.
+
+    Args:
+        gear_signals: [{mmsi, name, lat, lon}, ...] — track_gear_identity 와 동일 입력.
+        now: 사이클 기준 시각(UTC).
+
+    Returns:
+        공존 쌍 리스트. 세 개 이상 동시 송출 케이스는 모든 2-조합을 생성한다.
+        각 원소:
+          {
+            'name': str,
+            'mmsi_lo': str,           # 사전순으로 작은 MMSI
+            'mmsi_hi': str,
+            'lat_lo', 'lon_lo': float,
+            'lat_hi', 'lon_hi': float,
+            'distance_km': float,
+            'parent_name': Optional[str],   # 힌트 (GEAR_PATTERN parent 그룹, 있으면)
+            'observed_at': datetime,
+          }
+    """
+    if not gear_signals:
+        return []
+
+    # 이름 기준 그룹핑
+    by_name: dict[str, list[dict]] = {}
+    for sig in gear_signals:
+        name = sig.get('name')
+        mmsi = sig.get('mmsi')
+        if not name or not mmsi:
+            continue
+        by_name.setdefault(name, []).append(sig)
+
+    collisions: list[dict] = []
+    for name, signals in by_name.items():
+        if len(signals) < MIN_COEXISTENCE_GROUP:
+            continue
+        # 같은 MMSI 중복은 제거 (한 cycle 에 동일 MMSI 가 다수 신호로 들어올 수 있음)
+        unique_by_mmsi: dict[str, dict] = {}
+        for sig in signals:
+            unique_by_mmsi.setdefault(sig['mmsi'], sig)
+        if len(unique_by_mmsi) < MIN_COEXISTENCE_GROUP:
+            continue
+
+        parent_name = _infer_parent_name(name)
+        mmsis = sorted(unique_by_mmsi.keys())
+        for a, b in combinations(mmsis, 2):
+            sa, sb = unique_by_mmsi[a], unique_by_mmsi[b]
+            dist_km = _haversine_km(
+                sa.get('lat'), sa.get('lon'),
+                sb.get('lat'), sb.get('lon'),
+            )
+            collisions.append({
+                'name': name,
+                'mmsi_lo': a,
+                'mmsi_hi': b,
+                'lat_lo': _to_float(sa.get('lat')),
+                'lon_lo': _to_float(sa.get('lon')),
+                'lat_hi': _to_float(sb.get('lat')),
+                'lon_hi': _to_float(sb.get('lon')),
+                'distance_km': dist_km,
+                'parent_name': parent_name,
+                'observed_at': now,
+            })
+    return collisions
+
+
+def classify_severity(
+    coexistence_count: int,
+    max_distance_km: Optional[float],
+    swap_count: int = 0,
+) -> str:
+    """충돌 심각도 산정.
+
+    - CRITICAL: 거리 불가능 / 누적 공존 N회 이상
+    - HIGH:     상당 거리 / 2회 이상
+    - MEDIUM:   단발 근거리
+    - LOW:      근거리 + 거리 정보 없음
+    """
+    distance = max_distance_km or 0.0
+    if distance >= CRITICAL_DISTANCE_KM:
+        return 'CRITICAL'
+    if coexistence_count >= CRITICAL_COEXISTENCE_COUNT:
+        return 'CRITICAL'
+    if distance >= HIGH_DISTANCE_KM:
+        return 'HIGH'
+    if coexistence_count >= HIGH_COEXISTENCE_COUNT:
+        return 'HIGH'
+    if swap_count >= HIGH_COEXISTENCE_COUNT:
+        return 'HIGH'
+    if max_distance_km is None or max_distance_km < 0.1:
+        return 'LOW'
+    return 'MEDIUM'
+
+
+def _haversine_km(lat1, lon1, lat2, lon2) -> float:
+    """두 좌표 사이 거리를 km 로 반환. 입력 누락 시 0.0."""
+    try:
+        if lat1 is None or lon1 is None or lat2 is None or lon2 is None:
+            return 0.0
+        nm = haversine_nm(float(lat1), float(lon1), float(lat2), float(lon2))
+        return round(nm * NM_TO_KM, 2)
+    except (TypeError, ValueError):
+        return 0.0
+
+
+def _to_float(val) -> Optional[float]:
+    if val is None:
+        return None
+    try:
+        return float(val)
+    except (TypeError, ValueError):
+        return None
+
+
+def _infer_parent_name(gear_name: str) -> Optional[str]:
+    """어구 이름에서 모선명 부분 추출 (느슨).
+
+    fleet_tracker 가 이미 GEAR_PATTERN 으로 정교하게 파싱하지만, 알고리즘 모듈 독립성을
+    위해 단순 휴리스틱만 유지한다. 값이 필요한 경우 fleet_tracker 호출부에서 덮어쓴다.
+    """
+    if not gear_name:
+        return None
+    # '_숫자' 로 끝나는 서픽스 제거
+    base = gear_name
+    parts = base.rsplit('_', 2)
+    if len(parts) >= 2 and any(ch.isdigit() for ch in parts[-1]):
+        return parts[0]
+    return None

prediction/fleet_tracker.py

@@ -1,4 +1,5 @@
 """등록 선단 기반 추적기."""
+import json
 import logging
 import re
 import time
@@ -6,7 +7,9 @@ from datetime import datetime, timezone
 from typing import Optional
 
 import pandas as pd
+import psycopg2
 
+from algorithms.gear_identity import classify_severity, detect_gear_name_collisions
 from algorithms.gear_name_rules import is_trackable_parent_name
 from config import qualified_table
 
@@ -21,6 +24,7 @@ FLEET_COMPANIES = qualified_table('fleet_companies')
 FLEET_VESSELS = qualified_table('fleet_vessels')
 GEAR_IDENTITY_LOG = qualified_table('gear_identity_log')
 GEAR_CORRELATION_SCORES = qualified_table('gear_correlation_scores')
+GEAR_IDENTITY_COLLISIONS = qualified_table('gear_identity_collisions')
 FLEET_TRACKING_SNAPSHOT = qualified_table('fleet_tracking_snapshot')
 
 # 선박명 정규화 (중국/한국 어선 식별자 보존):
@@ -341,61 +345,40 @@ class FleetTracker:
         """어구/어망 정체성 추적.
 
         gear_signals: [{mmsi, name, lat, lon}, ...] — 이름이 XXX_숫자_숫자 패턴인 AIS 신호
+
+        동일 이름이 서로 다른 MMSI 로 같은 cycle 에 동시에 수신된 경우는 "공존
+        (GEAR_IDENTITY_COLLISION)" 으로 간주해 gear_identity_collisions 에 누적하고,
+        gear_identity_log 는 각 MMSI 별로 독립 active 유지한다 (비활성화/점수 이전 X).
+        단일 MMSI 이름에 한해 기존 교체(sequential) 로직을 적용한다.
         """
         cur = conn.cursor()
         now = datetime.now(timezone.utc)
+        self._recent_collision_ids: list[int] = []
 
+        # 1) 공존 감지 + UPSERT (이번 사이클에 동일 이름 다중 MMSI 수신 확인)
+        collisions = detect_gear_name_collisions(gear_signals, now)
+        colliding_names: set[str] = {c['name'] for c in collisions}
+        for c in collisions:
+            cid = self._upsert_gear_collision(cur, c, now)
+            if cid is not None:
+                self._recent_collision_ids.append(cid)
+
+        # 2) 개별 신호 처리
         for g in gear_signals:
             mmsi = g['mmsi']
             name = g['name']
             lat = g.get('lat', 0)
             lon = g.get('lon', 0)
 
-            # 모선명 + 인덱스 추출
-            parent_name: Optional[str] = None
-            idx1: Optional[int] = None
-            idx2: Optional[int] = None
-
-            m = GEAR_PATTERN.match(name)
-            if m:
-                # group(1): parent+index 패턴, group(2): 순수 숫자 패턴
-                if m.group(1):
-                    parent_name = m.group(1).strip()
-                    suffix = name[m.end(1):].strip(' _')
-                    digits = re.findall(r'\d+', suffix)
-                    idx1 = int(digits[0]) if len(digits) >= 1 else None
-                    idx2 = int(digits[1]) if len(digits) >= 2 else None
-                else:
-                    # 순수 숫자 이름 (예: 12345) — parent 없음, 인덱스만
-                    idx1 = int(m.group(2))
-            else:
-                m2 = GEAR_PATTERN_PCT.match(name)
-                if m2:
-                    parent_name = m2.group(1).strip()
-
+            parent_name, idx1, idx2 = self._parse_gear_name(name)
             effective_parent_name = parent_name or name
             if not is_trackable_parent_name(effective_parent_name):
                 continue
 
-            # 모선 매칭 (EXACT → FUZZY 순)
-            parent_mmsi: Optional[str] = None
-            parent_vid: Optional[int] = None
-            if parent_name:
-                vid = self._name_cn_map.get(parent_name)
-                if not vid:
-                    vid = self._name_en_map.get(parent_name.lower())
-                if not vid:
-                    key = _normalize_vessel_name(parent_name)
-                    if key:
-                        candidates = self._name_fuzzy_map.get(key, [])
-                        if len(candidates) == 1:
-                            vid = candidates[0]
-                if vid:
-                    parent_vid = vid
-                    parent_mmsi = self._vessels[vid].get('mmsi')
-
+            parent_mmsi, parent_vid = self._match_parent_vessel(parent_name)
             match_method: Optional[str] = 'NAME_PARENT' if parent_vid else None
             confidence = 0.9 if parent_vid else 0.0
+            is_colliding = name in colliding_names
 
             # 기존 활성 행 조회
             cur.execute(
@@ -431,36 +414,26 @@ class FleetTracker:
                          match_method, confidence, now, now),
                     )
             else:
-                # 새 MMSI → 같은 이름이 다른 MMSI로 있는지 확인
-                cur.execute(
-                    f"""SELECT id, mmsi FROM {GEAR_IDENTITY_LOG}
-                       WHERE name = %s AND is_active = TRUE AND mmsi != %s""",
-                    (name, mmsi),
-                )
-                old_mmsi_row = cur.fetchone()
-                if old_mmsi_row:
-                    # 같은 이름 + 다른 MMSI → MMSI 변경
+                # 새 MMSI — 이름이 공존 케이스면 다른 MMSI 활성행을 건드리지 않고 이번 것만 INSERT
+                if not is_colliding:
+                    # 교체 경로 — 같은 이름이 다른 MMSI 로 active 면 MMSI 교체로 간주
                     cur.execute(
-                        f'UPDATE {GEAR_IDENTITY_LOG} SET is_active = FALSE WHERE id = %s',
-                        (old_mmsi_row[0],),
+                        f"""SELECT id, mmsi FROM {GEAR_IDENTITY_LOG}
+                           WHERE name = %s AND is_active = TRUE AND mmsi != %s""",
+                        (name, mmsi),
                     )
-                    logger.info('gear MMSI change: %s → %s (name=%s)', old_mmsi_row[1], mmsi, name)
-
-                    # 어피니티 점수 이전 (이전 MMSI → 새 MMSI)
-                    try:
+                    old_mmsi_row = cur.fetchone()
+                    if old_mmsi_row:
                         cur.execute(
-                            f"UPDATE {GEAR_CORRELATION_SCORES} "
-                            "SET target_mmsi = %s, updated_at = NOW() "
-                            "WHERE target_mmsi = %s",
-                            (mmsi, old_mmsi_row[1]),
+                            f'UPDATE {GEAR_IDENTITY_LOG} SET is_active = FALSE WHERE id = %s',
+                            (old_mmsi_row[0],),
                         )
-                        if cur.rowcount > 0:
-                            logger.info(
-                                'transferred %d affinity scores: %s → %s',
-                                cur.rowcount, old_mmsi_row[1], mmsi,
-                            )
-                    except Exception as e:
-                        logger.warning('affinity score transfer failed: %s', e)
+                        logger.info(
+                            'gear MMSI change: %s → %s (name=%s)',
+                            old_mmsi_row[1], mmsi, name,
+                        )
+                        # 어피니티 점수 이전 (savepoint 로 격리 — PK 충돌 시 트랜잭션 유지)
+                        self._transfer_affinity_scores(cur, old_mmsi_row[1], mmsi)
 
                 cur.execute(
                     f"""INSERT INTO {GEAR_IDENTITY_LOG}
@@ -473,9 +446,190 @@ class FleetTracker:
                      match_method, confidence, now, now),
                 )
 
+        if collisions:
+            logger.info(
+                'gear identity collisions: %d pairs touched (%d distinct names)',
+                len(collisions), len(colliding_names),
+            )
         conn.commit()
         cur.close()
 
+    def _parse_gear_name(self, name: str) -> tuple[Optional[str], Optional[int], Optional[int]]:
+        """어구 이름에서 parent_name, idx1, idx2 추출."""
+        parent_name: Optional[str] = None
+        idx1: Optional[int] = None
+        idx2: Optional[int] = None
+        m = GEAR_PATTERN.match(name)
+        if m:
+            if m.group(1):
+                parent_name = m.group(1).strip()
+                suffix = name[m.end(1):].strip(' _')
+                digits = re.findall(r'\d+', suffix)
+                idx1 = int(digits[0]) if len(digits) >= 1 else None
+                idx2 = int(digits[1]) if len(digits) >= 2 else None
+            else:
+                idx1 = int(m.group(2))
+        else:
+            m2 = GEAR_PATTERN_PCT.match(name)
+            if m2:
+                parent_name = m2.group(1).strip()
+        return parent_name, idx1, idx2
+
+    def _match_parent_vessel(self, parent_name: Optional[str]) -> tuple[Optional[str], Optional[int]]:
+        """parent_name → (parent_mmsi, parent_vessel_id) 매칭. EXACT → FUZZY 순."""
+        if not parent_name:
+            return None, None
+        vid = self._name_cn_map.get(parent_name)
+        if not vid:
+            vid = self._name_en_map.get(parent_name.lower())
+        if not vid:
+            key = _normalize_vessel_name(parent_name)
+            if key:
+                candidates = self._name_fuzzy_map.get(key, [])
+                if len(candidates) == 1:
+                    vid = candidates[0]
+        if vid:
+            return self._vessels[vid].get('mmsi'), vid
+        return None, None
+
+    def _transfer_affinity_scores(self, cur, old_mmsi: str, new_mmsi: str) -> None:
+        """gear_correlation_scores 의 target_mmsi 를 새 MMSI 로 이전.
+
+        PK = (model_id, group_key, sub_cluster_id, target_mmsi) 충돌 가능성이 있어
+        SAVEPOINT 로 격리. 충돌 시에는 이전을 포기하고 경고만 남긴다 — 상위 트랜잭션은
+        유지되어 뒤이은 INSERT 가 정상 동작한다.
+        """
+        cur.execute('SAVEPOINT sp_score_xfer')
+        try:
+            cur.execute(
+                f"UPDATE {GEAR_CORRELATION_SCORES} "
+                "SET target_mmsi = %s, updated_at = NOW() "
+                "WHERE target_mmsi = %s",
+                (new_mmsi, old_mmsi),
+            )
+            if cur.rowcount > 0:
+                logger.info(
+                    'transferred %d affinity scores: %s → %s',
+                    cur.rowcount, old_mmsi, new_mmsi,
+                )
+            cur.execute('RELEASE SAVEPOINT sp_score_xfer')
+        except psycopg2.errors.UniqueViolation as e:
+            cur.execute('ROLLBACK TO SAVEPOINT sp_score_xfer')
+            cur.execute('RELEASE SAVEPOINT sp_score_xfer')
+            logger.warning(
+                'affinity score transfer skipped (pk conflict): %s → %s | %s',
+                old_mmsi, new_mmsi, e,
+            )
+
+    def _upsert_gear_collision(
+        self,
+        cur,
+        collision: dict,
+        now: datetime,
+    ) -> Optional[int]:
+        """단일 공존 쌍 UPSERT → row id 반환.
+
+        - 기존 행: coexistence_count += 1, last_seen_at/좌표 갱신, max_distance_km =
+          GREATEST(기존, 신규). status 가 OPEN/REVIEWED 인 경우에 한해 severity 재계산.
+        - 신규 행: first_seen_at = last_seen_at = now, severity 계산 후 INSERT.
+        """
+        name = collision['name']
+        mmsi_lo = collision['mmsi_lo']
+        mmsi_hi = collision['mmsi_hi']
+        distance_km = collision.get('distance_km') or 0.0
+
+        # 모선 힌트 — fleet_tracker 매칭 결과를 우선, 없으면 알고리즘이 추출한 값 사용
+        hint_parent = collision.get('parent_name')
+        parent_mmsi, parent_vid = self._match_parent_vessel(hint_parent)
+
+        cur.execute(
+            f"""SELECT id, coexistence_count, max_distance_km, swap_count,
+                       status, parent_name, parent_vessel_id
+                  FROM {GEAR_IDENTITY_COLLISIONS}
+                 WHERE name = %s AND mmsi_lo = %s AND mmsi_hi = %s""",
+            (name, mmsi_lo, mmsi_hi),
+        )
+        row = cur.fetchone()
+        evidence_fragment = {
+            'observed_at': now.isoformat(),
+            'distance_km': distance_km,
+            'positions': {
+                mmsi_lo: {
+                    'lat': collision.get('lat_lo'),
+                    'lon': collision.get('lon_lo'),
+                },
+                mmsi_hi: {
+                    'lat': collision.get('lat_hi'),
+                    'lon': collision.get('lon_hi'),
+                },
+            },
+        }
+
+        if row:
+            (row_id, cur_count, cur_max_dist, swap_cnt,
+             cur_status, cur_parent_name, cur_parent_vid) = row
+            new_count = (cur_count or 0) + 1
+            merged_max = max(
+                float(cur_max_dist or 0),
+                float(distance_km or 0),
+            )
+            if cur_status in ('CONFIRMED_ILLEGAL', 'FALSE_POSITIVE'):
+                new_severity = None  # 확정 상태는 유지
+            else:
+                new_severity = classify_severity(new_count, merged_max, swap_cnt or 0)
+            cur.execute(
+                f"""UPDATE {GEAR_IDENTITY_COLLISIONS}
+                      SET last_seen_at       = %s,
+                          coexistence_count  = %s,
+                          max_distance_km    = %s,
+                          last_lat_lo        = %s,
+                          last_lon_lo        = %s,
+                          last_lat_hi        = %s,
+                          last_lon_hi        = %s,
+                          parent_name        = COALESCE(%s, parent_name),
+                          parent_vessel_id   = COALESCE(%s, parent_vessel_id),
+                          severity           = COALESCE(%s, severity),
+                          evidence           = COALESCE(evidence, '[]'::jsonb)
+                                               || to_jsonb(%s::jsonb),
+                          updated_at         = NOW()
+                    WHERE id = %s""",
+                (
+                    now, new_count, merged_max,
+                    collision.get('lat_lo'), collision.get('lon_lo'),
+                    collision.get('lat_hi'), collision.get('lon_hi'),
+                    hint_parent, parent_vid,
+                    new_severity,
+                    json.dumps([evidence_fragment]),
+                    row_id,
+                ),
+            )
+            return row_id
+
+        severity = classify_severity(1, distance_km, 0)
+        cur.execute(
+            f"""INSERT INTO {GEAR_IDENTITY_COLLISIONS}
+                  (name, mmsi_lo, mmsi_hi, parent_name, parent_vessel_id,
+                   first_seen_at, last_seen_at,
+                   coexistence_count, max_distance_km,
+                   last_lat_lo, last_lon_lo, last_lat_hi, last_lon_hi,
+                   severity, status, evidence)
+                VALUES (%s,%s,%s,%s,%s,%s,%s,1,%s,%s,%s,%s,%s,%s,'OPEN',%s)
+                RETURNING id""",
+            (
+                name, mmsi_lo, mmsi_hi, hint_parent, parent_vid,
+                now, now, distance_km,
+                collision.get('lat_lo'), collision.get('lon_lo'),
+                collision.get('lat_hi'), collision.get('lon_hi'),
+                severity,
+                json.dumps([evidence_fragment]),
+            ),
+        )
+        return cur.fetchone()[0]
+
+    def get_recent_collision_ids(self) -> list[int]:
+        """이번 사이클에 갱신·추가된 gear_identity_collisions row id 목록."""
+        return list(getattr(self, '_recent_collision_ids', []))
+
     def build_fleet_clusters(self, vessel_dfs: dict[str, pd.DataFrame]) -> dict[str, dict]:
         """등록 선단 기준으로 cluster 정보 구성.
 

prediction/output/event_generator.py

@@ -19,6 +19,7 @@ from db.kcgdb import get_conn
 logger = logging.getLogger(__name__)
 
 EVENTS_TABLE = qualified_table('prediction_events')
+GEAR_IDENTITY_COLLISIONS_TABLE = qualified_table('gear_identity_collisions')
 
 # 카테고리별 dedup 윈도우 (분).
 # 사이클이 5분 간격이므로 5의 배수를 피해서 boundary 일제 만료 패턴을 회피한다.
@@ -34,6 +35,7 @@ DEDUP_WINDOWS = {
     'GEAR_ILLEGAL': 367,
     'AIS_RESUME': 67,
     'HIGH_RISK_VESSEL': 67,
+    'GEAR_IDENTITY_COLLISION': 367,   # 같은 쌍의 반복 공존은 장기 이벤트로 집계
 }
 
 # 이벤트 생성 룰
@@ -294,3 +296,123 @@ def run_event_generator(analysis_results: list[dict]) -> dict:
 
     logger.info(f'event_generator: generated={generated}, skipped_dedup={skipped_dedup}')
     return {'generated': generated, 'skipped_dedup': skipped_dedup}
+
+
+_COLLISION_EVENT_LEVELS = {'CRITICAL', 'HIGH'}
+
+
+def run_gear_identity_collision_events(collision_ids: list[int]) -> dict:
+    """gear_identity_collisions 의 갱신 행을 prediction_events 로 승격.
+
+    이번 cycle 에 갱신·추가된 row 중 severity 가 CRITICAL/HIGH 이고 status=OPEN 인 것만
+    이벤트 허브에 등록한다. dedup 키는 `{name}:{mmsi_lo}:{mmsi_hi}` 기준으로 장기 윈도우.
+
+    Args:
+        collision_ids: fleet_tracker.get_recent_collision_ids() 가 돌려준 id 목록
+
+    Returns:
+        { 'generated': int, 'skipped_dedup': int, 'skipped_low': int }
+    """
+    if not collision_ids:
+        return {'generated': 0, 'skipped_dedup': 0, 'skipped_low': 0}
+
+    now = datetime.now(timezone.utc)
+    generated = 0
+    skipped_dedup = 0
+    skipped_low = 0
+    events_to_insert: list[tuple] = []
+
+    with get_conn() as conn:
+        date_str = now.strftime('%Y%m%d')
+        seq = _get_next_seq(conn, date_str)
+
+        cur = conn.cursor()
+        cur.execute(
+            f"""SELECT id, name, mmsi_lo, mmsi_hi, parent_name,
+                       coexistence_count, max_distance_km, severity, status,
+                       last_lat_lo, last_lon_lo
+                  FROM {GEAR_IDENTITY_COLLISIONS_TABLE}
+                 WHERE id = ANY(%s)""",
+            (list(collision_ids),),
+        )
+        rows = cur.fetchall()
+
+        for (cid, name, mmsi_lo, mmsi_hi, parent_name,
+             coexist_count, max_dist, severity, status,
+             lat_lo, lon_lo) in rows:
+            if status != 'OPEN':
+                skipped_low += 1
+                continue
+            if severity not in _COLLISION_EVENT_LEVELS:
+                skipped_low += 1
+                continue
+
+            category = 'GEAR_IDENTITY_COLLISION'
+            dedup_key = f"{name}:{mmsi_lo}:{mmsi_hi}:{category}"
+
+            if _check_dedup(conn, dedup_key, category, now):
+                skipped_dedup += 1
+                continue
+
+            event_uid = _make_event_uid(now, seq)
+            seq += 1
+
+            distance_txt = f"{float(max_dist or 0):.1f}km"
+            title = (
+                f"어구 정체성 충돌: {name} "
+                f"({mmsi_lo} ↔ {mmsi_hi}, 공존 {coexist_count}회, 거리 {distance_txt})"
+            )
+            features = {
+                'collision_id': cid,
+                'name': name,
+                'mmsi_lo': mmsi_lo,
+                'mmsi_hi': mmsi_hi,
+                'coexistence_count': coexist_count,
+                'max_distance_km': float(max_dist or 0),
+                'parent_name': parent_name,
+            }
+            events_to_insert.append((
+                event_uid,
+                now,
+                severity,
+                category,
+                title,
+                None,                               # detail
+                mmsi_lo,                            # 대표 MMSI (검색 편의)
+                parent_name,                        # vessel_name
+                None,                               # area_name
+                None,                               # zone_code
+                float(lat_lo) if lat_lo is not None else None,
+                float(lon_lo) if lon_lo is not None else None,
+                None,                               # speed_kn
+                'GEAR_COLLISION',                   # source_type
+                cid,                                # source_ref_id
+                None,                               # ai_confidence
+                'NEW',
+                dedup_key,
+                json.dumps(features, ensure_ascii=False, default=str),
+            ))
+            generated += 1
+
+        if events_to_insert:
+            execute_values(
+                conn.cursor(),
+                f"""INSERT INTO {EVENTS_TABLE}
+                    (event_uid, occurred_at, level, category, title, detail,
+                     vessel_mmsi, vessel_name, area_name, zone_code, lat, lon, speed_kn,
+                     source_type, source_ref_id, ai_confidence, status, dedup_key, features)
+                    VALUES %s
+                    ON CONFLICT (event_uid) DO NOTHING""",
+                events_to_insert,
+            )
+            conn.commit()
+
+    logger.info(
+        'gear_collision_events: generated=%d, skipped_dedup=%d, skipped_low=%d',
+        generated, skipped_dedup, skipped_low,
+    )
+    return {
+        'generated': generated,
+        'skipped_dedup': skipped_dedup,
+        'skipped_low': skipped_low,
+    }

prediction/scheduler.py

@@ -157,6 +157,21 @@ def run_analysis_cycle():
             gear_signals = [v for v in all_ais if GEAR_PATTERN.match(v.get('name', '') or '')]
             fleet_tracker.track_gear_identity(gear_signals, kcg_conn)
 
+            # 이번 사이클에 갱신된 어구 정체성 충돌을 이벤트 허브로 승격 (CRITICAL/HIGH 만)
+            collision_ids = fleet_tracker.get_recent_collision_ids()
+            if collision_ids:
+                try:
+                    from output.event_generator import run_gear_identity_collision_events
+                    collision_events = run_gear_identity_collision_events(collision_ids)
+                    logger.info(
+                        'gear collision events: generated=%d, skipped_dedup=%d, skipped_low=%d',
+                        collision_events['generated'],
+                        collision_events['skipped_dedup'],
+                        collision_events['skipped_low'],
+                    )
+                except Exception as e:
+                    logger.warning('gear collision event promotion failed: %s', e)
+
             fleet_roles = fleet_tracker.build_fleet_clusters(vessel_dfs)
 
             fleet_tracker.save_snapshot(vessel_dfs, kcg_conn)