diff --git a/src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java b/src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java
index 1bc335d..ecefb2b 100644
--- a/src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java
+++ b/src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java
@@ -360,7 +360,7 @@ public class GisServiceV2 {
             }
         }
 
-        // 3-a. hourly 범위 → L2 캐시 → DB fallback
+        // 3-a. hourly 범위 → L2 캐시 → DB fallback (누락 MMSI 부분 fallback 포함)
         if (split.hasHourlyRange()) {
             DailyTrackCacheManager.DateRange hr = split.getHourlyRange();
             Map<String, List<VesselTrack>> hourlyTracks =
@@ -373,6 +373,19 @@ public class GisServiceV2 {
                 int totalPts = converted.stream().mapToInt(CompactVesselTrack::getPointCount).sum();
                 log.info("[CACHE-MONITOR] queryWithCache L2 HIT [{}, {}): cacheVessels={}, filteredVessels={}, compactTracks={}, points={}",
                         hr.getStart(), hr.getEnd(), hourlyTracks.size(), filtered.size(), converted.size(), totalPts);
+
+                // 캐시에 없는 MMSI → DB fallback
+                Set<String> missingMmsis = new HashSet<>(requestedMmsis);
+                missingMmsis.removeAll(filtered.keySet());
+                if (!missingMmsis.isEmpty()) {
+                    VesselTracksRequest fallbackReq = VesselTracksRequest.builder()
+                            .startTime(hr.getStart()).endTime(hr.getEnd())
+                            .vessels(new ArrayList<>(missingMmsis)).build();
+                    List<CompactVesselTrack> dbResult = gisService.getVesselTracks(fallbackReq);
+                    allTracks.addAll(dbResult);
+                    log.info("[CACHE-MONITOR] queryWithCache L2 PARTIAL → DB fallback: cacheHit={}, cacheMiss={}, dbTracks={}",
+                            filtered.size(), missingMmsis.size(), dbResult.size());
+                }
             } else {
                 VesselTracksRequest hourlyReq = VesselTracksRequest.builder()
                         .startTime(hr.getStart()).endTime(hr.getEnd())
@@ -384,7 +397,7 @@ public class GisServiceV2 {
             }
         }
 
-        // 3-b. 5min 범위 → L1 캐시 → DB fallback
+        // 3-b. 5min 범위 → L1 캐시 → DB fallback (누락 MMSI 부분 fallback 포함)
         if (split.hasFiveMinRange()) {
             DailyTrackCacheManager.DateRange fr = split.getFiveMinRange();
             Map<String, List<VesselTrack>> fiveMinTracks =
@@ -397,6 +410,19 @@ public class GisServiceV2 {
                 int totalPts = converted.stream().mapToInt(CompactVesselTrack::getPointCount).sum();
                 log.info("[CACHE-MONITOR] queryWithCache L1 HIT [{}, {}): cacheVessels={}, filteredVessels={}, compactTracks={}, points={}",
                         fr.getStart(), fr.getEnd(), fiveMinTracks.size(), filtered.size(), converted.size(), totalPts);
+
+                // 캐시에 없는 MMSI → DB fallback
+                Set<String> missingMmsis = new HashSet<>(requestedMmsis);
+                missingMmsis.removeAll(filtered.keySet());
+                if (!missingMmsis.isEmpty()) {
+                    VesselTracksRequest fallbackReq = VesselTracksRequest.builder()
+                            .startTime(fr.getStart()).endTime(fr.getEnd())
+                            .vessels(new ArrayList<>(missingMmsis)).build();
+                    List<CompactVesselTrack> dbResult = gisService.getVesselTracks(fallbackReq);
+                    allTracks.addAll(dbResult);
+                    log.info("[CACHE-MONITOR] queryWithCache L1 PARTIAL → DB fallback: cacheHit={}, cacheMiss={}, dbTracks={}",
+                            filtered.size(), missingMmsis.size(), dbResult.size());
+                }
             } else {
                 VesselTracksRequest fiveMinReq = VesselTracksRequest.builder()
                         .startTime(fr.getStart()).endTime(fr.getEnd())