diff --git a/STEP_RECORD.md b/STEP_RECORD.md
index a13396e..bc1c760 100644
--- a/STEP_RECORD.md
+++ b/STEP_RECORD.md
@@ -17,7 +17,7 @@ Remote: `ssh://git@nas:2222/tei/pbf.git`
 当前页面支持 2 个 profile，但仍是同一张 HTML：
 
 1. 唐津 20 海里
-   - `Style: karatsu-final-style-r4-20260401-1523 (style.navsea-delivery-karatsu-20nm-final.json)`
+   - `Style: karatsu-final-style-r5-20260401-1540 (style.navsea-delivery-karatsu-20nm-final.json)`
    - `PBF: karatsu-final-pbf-20nm-20260401-0248 (pbf-delivery-karatsu-20nm-final)`
 
 2. 九州
@@ -87,6 +87,11 @@ Remote: `ssh://git@nas:2222/tei/pbf.git`
 
 - 当前 `20nm final` 这条线，危险物对象保真已经过关
 - 当前主矛盾是 `style`
+- 当前又补了一条危险物样式纠偏：
+  - `測定済みの沈船 / 船体露出沈船 / 危険全沈没船` 这类沉船对象不能继续走泛化 `wreck=429` 或 `hazard_mark=428`
+  - 当前 compare 页里，`anchor_caution_hazard_point` 已改成：
+    - 有 `class_code` 时只走 class-specific 图标层
+  - 这次修正的直接目的就是避免“沉船被画成鱼礁/眼形符号”
 
 ## Object Preservation Audit
 
diff --git a/navsea_tile_builder.py b/navsea_tile_builder.py
index 5a2a3d8..925f5d8 100644
--- a/navsea_tile_builder.py
+++ b/navsea_tile_builder.py
@@ -1110,7 +1110,7 @@ class NavSeaTileBuilder:
         if source_layer in {"p投錨注意障害物", "p航行危険障害物"}:
             if "魚礁" in object_type:
                 return "hazard", "fish_reef"
-            if "沈船" in object_type:
+            if "沈船" in object_type or "沈没船" in object_type:
                 return "hazard", "wreck"
             if any(token in object_type for token in ("暗岩", "洗岩", "干出岩", "水上岩", "露出岩")):
                 return "hazard", "rock_awash"
@@ -1323,7 +1323,7 @@ class NavSeaTileBuilder:
             return "rock", "critical"
         if any(token in object_type for token in ("岩礁", "サンゴ礁")):
             return "reef", "major"
-        if "沈船" in object_type:
+        if "沈船" in object_type or "沈没船" in object_type:
             if "危険" in object_type or "露出" in object_type:
                 return "wreck", "critical"
             return "wreck", "major"
@@ -1379,6 +1379,12 @@ class NavSeaTileBuilder:
             if light_color_code:
                 return "light-daytime-3"
         if source_layer in {"p航行危険障害物", "p投錨注意障害物"}:
+            if "船体露出沈船" in canonical_object_type:
+                return "symbol-daytime-410"
+            if "危険全沈没船" in canonical_object_type:
+                return "symbol-daytime-412"
+            if "測定済みの沈船" in canonical_object_type:
+                return "symbol-daytime-413"
             if chart_symbol_code == "fish_reef":
                 return "symbol-daytime-428"
             if hazard_class == "rock":
diff --git a/src/pbf/navsea-compare-karatsu-20nm.html b/src/pbf/navsea-compare-karatsu-20nm.html
index 3eca7d0..ee9b2d4 100644
--- a/src/pbf/navsea-compare-karatsu-20nm.html
+++ b/src/pbf/navsea-compare-karatsu-20nm.html
@@ -325,7 +325,7 @@
         deliveryPaneLabel: "最终 release style + 唐津 20 海里 final PBF",
         deliveryStyleUrl: "./domain/style.navsea-delivery-karatsu-20nm-final.json",
         deliveryTileUrl: "http://192.168.200.184/pbf-delivery-karatsu-20nm-final/{z}/{x}/{y}.pbf",
-        deliveryStyleVersion: "karatsu-final-style-r4-20260401-1523",
+        deliveryStyleVersion: "karatsu-final-style-r5-20260401-1540",
         deliveryPbfVersion: "karatsu-final-pbf-20nm-20260401-0248",
         deliveryStyleFile: "style.navsea-delivery-karatsu-20nm-final.json",
         deliveryPbfName: "pbf-delivery-karatsu-20nm-final",
diff --git a/src/pbf/style.navsea-delivery-karatsu-20nm-final.json b/src/pbf/style.navsea-delivery-karatsu-20nm-final.json
index 7edcfc2..5b5e08c 100644
--- a/src/pbf/style.navsea-delivery-karatsu-20nm-final.json
+++ b/src/pbf/style.navsea-delivery-karatsu-20nm-final.json
@@ -1331,6 +1331,13 @@
       },
       "filter": [
         "all",
+        [
+          "!",
+          [
+            "has",
+            "class_code"
+          ]
+        ],
         [
           "!=",
           [