diff --git a/STEP_RECORD.md b/STEP_RECORD.md
index 8de4d66..e1a677f 100644
--- a/STEP_RECORD.md
+++ b/STEP_RECORD.md
@@ -218,6 +218,111 @@
 2. 先把“旧坏 tile”与“主线 style 差异”两类问题彻底拆开
 3. 之后再决定是否把这套 rebuild 从热点 AOI 扩到全国更大范围
 
+## 2026-04-18 全国 full 重建进行中：分片重建 + staging 截图审计
+
+### 1. 本轮页面与脚本调整
+
+- 已把全国人工审计页继续扩成支持右侧 `deliveryTileUrl` 覆盖：
+  - [`src/pbf/navsea-compare-full-audit.html`](/root/sourceserver/pbf/src/pbf/navsea-compare-full-audit.html)
+- 当前页面版本已提升到：
+  - `full-audit-r3-20260418-1546`
+- 已部署到：
+  - `/mnt/sda1/www/newpec/navsea-compare-full-audit.html`
+- 已把全国 AOI 截图审计脚本扩成支持只跑指定 variant：
+  - [`navsea_full_aoi_visual_audit.py`](/root/sourceserver/pbf/navsea_full_aoi_visual_audit.py)
+  - 新增参数：
+    - `--variant full`
+    - `--variant semantic`
+
+### 2. 全国 full 重建策略调整
+
+- 因当前工作树中的 [`navsea_tile_builder.py`](/root/sourceserver/pbf/navsea_tile_builder.py) 还混有语义版 sprite 迁移试验改动
+- 本轮全国 `full` 重建没有直接用工作树文件
+- 而是固定使用 `HEAD` 版本临时 builder：
+  - `/tmp/navsea_tile_builder_head_20260418.py`
+- 重建方式改为：
+  - 以当前全国 `full` 目录为 reference footprint
+  - 对 `z0_8 / z9_10 / z11 / z12` 分片重建
+- 当前分片目录：
+  - `/home/wwwroot/pbf-delivery-full-20260418-rebuild.parts/z0_8`
+  - `/home/wwwroot/pbf-delivery-full-20260418-rebuild.parts/z9_10`
+  - `/home/wwwroot/pbf-delivery-full-20260418-rebuild.parts/z11`
+  - `/home/wwwroot/pbf-delivery-full-20260418-rebuild.parts/z12`
+
+### 3. 并发策略修正
+
+- 机器实际仅 `4` 核
+- 本轮中途确认：
+  - 之前直接对多分片同时开 `24 / 96 worker`
+  会造成严重过度并发
+- 已改成当前更稳定的组合：
+  - `z12: workers=96`
+  - `z11: workers=4`
+  - `z9_10: workers=2`
+  - `z0_8: workers=1`
+- 当前目标不是一次把机器打满
+- 而是让 `z12` 热点风险先落盘，同时补齐其余 zoom
+
+### 4. z12 staging 目录
+
+- 为了在全国 rebuild 尚未全量完成前先做热点截图闭环
+- 已创建 staging 根目录：
+  - `/home/wwwroot/pbf-delivery-full-20260418-staging-z12`
+- 方式：
+  - 先复制当前 `full`
+  - 再持续用已重建的 `z12` 新 tile 覆盖
+- 用途：
+  - 让右侧截图优先加载新 `z12`
+  - 未重建到的地方仍由旧 `full` 兜底
+  - 避免人工审计页因为“未生成到”而出现伪空白
+
+### 5. 当前 staging 截图审计结果
+
+- 冲绳 `10nm z12` staging 复跑：
+  - [`report/full_rebuild_staging_okinawa_z12_2026-04-18/full_aoi_visual_audit.md`](/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_2026-04-18/full_aoi_visual_audit.md)
+  - [`report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/full_aoi_visual_audit.md`](/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/full_aoi_visual_audit.md)
+  - 当前 `changed_ratio = 0.786184`
+- 博多 / 唐津 `z12` staging 复跑：
+  - [`report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/full_aoi_visual_audit.md`](/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/full_aoi_visual_audit.md)
+  - 结果：
+    - `karatsu_5nm_full_z12 = 0.757473`
+    - `hakata_10nm_full_z12 = 0.529882`
+
+### 6. 当前视觉判断
+
+- 新 rebuild `z12` 覆盖后：
+  - 唐津右图中此前那类“岛屿错位 / 大片空白”现象未再出现
+- 当前 remaining diff 更像：
+  - delivery `full` 与原始 `newpec` 的底图 / 道路 / 色彩 / 文本表达差异
+- 也就是说本轮已经进一步确认：
+  - “坏片几何问题”
+  - 与
+  - “整体样式表达差异”
+  应分开审计
+
+### 7. 当前重建进度快照
+
+- 截止本记录更新时：
+  - `z0_8 = 45`
+  - `z9_10 = 1212`
+  - `z11 = 2240`
+  - `z12 = 16261`
+- 目标参考总量：
+  - `z0_8 = 344`
+  - `z9_10 = 3969`
+  - `z11 = 12279`
+  - `z12 = 48556`
+
+### 8. 下一步
+
+1. 继续把全国 `full` 四个分片全部跑完并合并成：
+   - `/home/wwwroot/pbf-delivery-full-20260418-rebuild`
+2. 对最终 rebuild 根目录跑：
+   - extent / shift 审计
+   - geometry / native 风险审计
+3. 再用最终 rebuild 根目录做全国固定 AOI 的正式截图对比审计
+4. 完成后再更新最终结论与 commit
+
 ## 2026-04-18 全国高 extent 错重编码根因钉实
 
 ### 1. 本轮新结论
diff --git a/navsea_full_aoi_visual_audit.py b/navsea_full_aoi_visual_audit.py
index 75cfbe6..6d48e90 100644
--- a/navsea_full_aoi_visual_audit.py
+++ b/navsea_full_aoi_visual_audit.py
@@ -27,6 +27,7 @@ def parse_args() -> argparse.Namespace:
     parser.add_argument("--bottom-trim", type=int, default=30)
     parser.add_argument("--timeout-sec", type=int, default=120)
     parser.add_argument("--virtual-time-budget-ms", type=int, default=30000)
+    parser.add_argument("--variant", action="append", choices=("full", "semantic"), help="只跑指定 variant，可重复传入")
     return parser.parse_args()
 
 
@@ -153,7 +154,8 @@ def main() -> None:
     aois = json.loads(args.aoi_json.read_text(encoding="utf-8"))
 
     cases: list[dict[str, Any]] = []
-    for variant in ("full", "semantic"):
+    variants = args.variant or ["full", "semantic"]
+    for variant in variants:
         for aoi in aois:
             for zoom in aoi["zoom_levels"]:
                 case_id = f"{aoi['id']}_{variant}_z{zoom}"
diff --git a/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/full_aoi_visual_audit.json b/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/full_aoi_visual_audit.json
new file mode 100644
index 0000000..9dbd3a9
--- /dev/null
+++ b/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/full_aoi_visual_audit.json
@@ -0,0 +1,73 @@
+{
+  "compare_url": "http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf",
+  "cases": [
+    {
+      "id": "karatsu_5nm_full_z12",
+      "label": "唐津 5 海里",
+      "variant": "full",
+      "zoom": 12,
+      "center": [
+        129.9697,
+        33.4425
+      ],
+      "radius_nm": 5,
+      "compare_url": "http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf&variant=full&audit=1&center=129.9697%2C33.4425&zoom=12",
+      "changed_pixels": 276326,
+      "total_pixels": 364800,
+      "changed_ratio": 0.757473,
+      "mean_abs_rgb": [
+        28.6339,
+        29.7368,
+        58.0848
+      ],
+      "rms_rgb": [
+        48.2024,
+        47.0653,
+        75.8149
+      ],
+      "diff_bbox": [
+        0,
+        0,
+        640,
+        513
+      ],
+      "left_image": "/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/karatsu_5nm_full_z12/compare_left.png",
+      "right_image": "/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/karatsu_5nm_full_z12/compare_right.png",
+      "diff_image": "/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/karatsu_5nm_full_z12/compare_diff.png"
+    },
+    {
+      "id": "hakata_10nm_full_z12",
+      "label": "博多港中心 10 海里",
+      "variant": "full",
+      "zoom": 12,
+      "center": [
+        130.335,
+        33.6385
+      ],
+      "radius_nm": 10,
+      "compare_url": "http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf&variant=full&audit=1&center=130.335%2C33.6385&zoom=12",
+      "changed_pixels": 193301,
+      "total_pixels": 364800,
+      "changed_ratio": 0.529882,
+      "mean_abs_rgb": [
+        20.6516,
+        21.4763,
+        26.4402
+      ],
+      "rms_rgb": [
+        45.2293,
+        45.5602,
+        50.335
+      ],
+      "diff_bbox": [
+        0,
+        0,
+        640,
+        513
+      ],
+      "left_image": "/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/hakata_10nm_full_z12/compare_left.png",
+      "right_image": "/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/hakata_10nm_full_z12/compare_right.png",
+      "diff_image": "/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/hakata_10nm_full_z12/compare_diff.png"
+    }
+  ]
+}
diff --git a/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/full_aoi_visual_audit.md b/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/full_aoi_visual_audit.md
new file mode 100644
index 0000000..5c70e15
--- /dev/null
+++ b/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/full_aoi_visual_audit.md
@@ -0,0 +1,29 @@
+# 全国 AOI 截图对比审计
+
+## 总览
+
+- compare page: `http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf`
+- cases: `2`
+
+## 差异排序
+
+### 唐津 5 海里 · full · z12
+
+- changed ratio: `0.757473`
+- changed pixels: `276326` / `364800`
+- mean abs rgb: `[28.6339, 29.7368, 58.0848]`
+- compare url: `http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf&variant=full&audit=1&center=129.9697%2C33.4425&zoom=12`
+- left image: `/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/karatsu_5nm_full_z12/compare_left.png`
+- right image: `/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/karatsu_5nm_full_z12/compare_right.png`
+- diff image: `/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/karatsu_5nm_full_z12/compare_diff.png`
+
+### 博多港中心 10 海里 · full · z12
+
+- changed ratio: `0.529882`
+- changed pixels: `193301` / `364800`
+- mean abs rgb: `[20.6516, 21.4763, 26.4402]`
+- compare url: `http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf&variant=full&audit=1&center=130.335%2C33.6385&zoom=12`
+- left image: `/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/hakata_10nm_full_z12/compare_left.png`
+- right image: `/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/hakata_10nm_full_z12/compare_right.png`
+- diff image: `/root/sourceserver/pbf/report/full_rebuild_staging_hakata_karatsu_z12_2026-04-18/hakata_10nm_full_z12/compare_diff.png`
+
diff --git a/report/full_rebuild_staging_okinawa_z12_2026-04-18/full_aoi_visual_audit.json b/report/full_rebuild_staging_okinawa_z12_2026-04-18/full_aoi_visual_audit.json
new file mode 100644
index 0000000..50a0d9d
--- /dev/null
+++ b/report/full_rebuild_staging_okinawa_z12_2026-04-18/full_aoi_visual_audit.json
@@ -0,0 +1,39 @@
+{
+  "compare_url": "http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf",
+  "cases": [
+    {
+      "id": "okinawa_10nm_full_z12",
+      "label": "冲绳 10 海里",
+      "variant": "full",
+      "zoom": 12,
+      "center": [
+        127.67,
+        26.21
+      ],
+      "radius_nm": 10,
+      "compare_url": "http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf&variant=full&audit=1&center=127.67%2C26.21&zoom=12",
+      "changed_pixels": 286800,
+      "total_pixels": 364800,
+      "changed_ratio": 0.786184,
+      "mean_abs_rgb": [
+        35.1541,
+        37.5348,
+        57.2885
+      ],
+      "rms_rgb": [
+        57.997,
+        59.3287,
+        80.8913
+      ],
+      "diff_bbox": [
+        0,
+        0,
+        640,
+        513
+      ],
+      "left_image": "/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_2026-04-18/okinawa_10nm_full_z12/compare_left.png",
+      "right_image": "/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_2026-04-18/okinawa_10nm_full_z12/compare_right.png",
+      "diff_image": "/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_2026-04-18/okinawa_10nm_full_z12/compare_diff.png"
+    }
+  ]
+}
diff --git a/report/full_rebuild_staging_okinawa_z12_2026-04-18/full_aoi_visual_audit.md b/report/full_rebuild_staging_okinawa_z12_2026-04-18/full_aoi_visual_audit.md
new file mode 100644
index 0000000..638de7b
--- /dev/null
+++ b/report/full_rebuild_staging_okinawa_z12_2026-04-18/full_aoi_visual_audit.md
@@ -0,0 +1,19 @@
+# 全国 AOI 截图对比审计
+
+## 总览
+
+- compare page: `http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf`
+- cases: `1`
+
+## 差异排序
+
+### 冲绳 10 海里 · full · z12
+
+- changed ratio: `0.786184`
+- changed pixels: `286800` / `364800`
+- mean abs rgb: `[35.1541, 37.5348, 57.2885]`
+- compare url: `http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf&variant=full&audit=1&center=127.67%2C26.21&zoom=12`
+- left image: `/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_2026-04-18/okinawa_10nm_full_z12/compare_left.png`
+- right image: `/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_2026-04-18/okinawa_10nm_full_z12/compare_right.png`
+- diff image: `/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_2026-04-18/okinawa_10nm_full_z12/compare_diff.png`
+
diff --git a/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/full_aoi_visual_audit.json b/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/full_aoi_visual_audit.json
new file mode 100644
index 0000000..f04d0d2
--- /dev/null
+++ b/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/full_aoi_visual_audit.json
@@ -0,0 +1,39 @@
+{
+  "compare_url": "http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf",
+  "cases": [
+    {
+      "id": "okinawa_10nm_full_z12",
+      "label": "冲绳 10 海里",
+      "variant": "full",
+      "zoom": 12,
+      "center": [
+        127.67,
+        26.21
+      ],
+      "radius_nm": 10,
+      "compare_url": "http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf&variant=full&audit=1&center=127.67%2C26.21&zoom=12",
+      "changed_pixels": 286800,
+      "total_pixels": 364800,
+      "changed_ratio": 0.786184,
+      "mean_abs_rgb": [
+        35.1541,
+        37.5348,
+        57.2885
+      ],
+      "rms_rgb": [
+        57.997,
+        59.3287,
+        80.8913
+      ],
+      "diff_bbox": [
+        0,
+        0,
+        640,
+        513
+      ],
+      "left_image": "/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/okinawa_10nm_full_z12/compare_left.png",
+      "right_image": "/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/okinawa_10nm_full_z12/compare_right.png",
+      "diff_image": "/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/okinawa_10nm_full_z12/compare_diff.png"
+    }
+  ]
+}
diff --git a/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/full_aoi_visual_audit.md b/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/full_aoi_visual_audit.md
new file mode 100644
index 0000000..1cde73d
--- /dev/null
+++ b/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/full_aoi_visual_audit.md
@@ -0,0 +1,19 @@
+# 全国 AOI 截图对比审计
+
+## 总览
+
+- compare page: `http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf`
+- cases: `1`
+
+## 差异排序
+
+### 冲绳 10 海里 · full · z12
+
+- changed ratio: `0.786184`
+- changed pixels: `286800` / `364800`
+- mean abs rgb: `[35.1541, 37.5348, 57.2885]`
+- compare url: `http://192.168.200.184/newpec/navsea-compare-full-audit.html?deliveryTileUrl=http%3A%2F%2F192.168.200.184%2Fpbf-delivery-full-20260418-staging-z12%2F%7Bz%7D%2F%7Bx%7D%2F%7By%7D.pbf&variant=full&audit=1&center=127.67%2C26.21&zoom=12`
+- left image: `/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/okinawa_10nm_full_z12/compare_left.png`
+- right image: `/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/okinawa_10nm_full_z12/compare_right.png`
+- diff image: `/root/sourceserver/pbf/report/full_rebuild_staging_okinawa_z12_r2_2026-04-18/okinawa_10nm_full_z12/compare_diff.png`
+
diff --git a/src/pbf/navsea-compare-full-audit.html b/src/pbf/navsea-compare-full-audit.html
index de50e1f..cd19e56 100644
--- a/src/pbf/navsea-compare-full-audit.html
+++ b/src/pbf/navsea-compare-full-audit.html
@@ -317,12 +317,13 @@
 
   <script src="https://unpkg.com/maplibre-gl@4.7.1/dist/maplibre-gl.js"></script>
   <script>
-    const HTML_VERSION = "full-audit-r2-20260416-1504";
+    const HTML_VERSION = "full-audit-r3-20260418-1546";
     const ORIGINAL_STYLE_URL = "./style.json";
     const ORIGINAL_TILE_URL = "http://192.168.200.184/newpec/exported_auto/tile.mapple-on.jp__newpec-mvt-20260106__z___x___y_.pbf/tiles/{z}/{x}/{y}.pbf";
     const searchParams = new URLSearchParams(window.location.search);
     const auditMode = searchParams.get("audit") === "1";
     const variantParam = (searchParams.get("variant") || "semantic").trim().toLowerCase();
+    const deliveryTileUrlOverride = (searchParams.get("deliveryTileUrl") || "").trim();
     const PROFILES = {
       full: {
         label: "全国",
@@ -439,7 +440,11 @@
       deliveryPaneLabelEl.textContent = PROFILE.deliveryPaneLabel;
       homeBtn.textContent = PROFILE.homeLabel;
       styleChip.textContent = `Style: ${PROFILE.deliveryStyleVersion} (${PROFILE.deliveryStyleFile})`;
-      pbfChip.textContent = `PBF: ${PROFILE.deliveryPbfVersion} (${PROFILE.deliveryPbfName})`;
+      if (deliveryTileUrlOverride) {
+        pbfChip.textContent = `PBF: override (${deliveryTileUrlOverride})`;
+      } else {
+        pbfChip.textContent = `PBF: ${PROFILE.deliveryPbfVersion} (${PROFILE.deliveryPbfName})`;
+      }
       spriteChip.textContent = `Sprite: ${PROFILE.deliverySpriteVersion} (${PROFILE.deliverySpriteName})`;
       document.title = `NavSea Compare · ${PROFILE.label}`;
     }
@@ -486,7 +491,8 @@
     function buildDeliveryStyle(style) {
       const next = structuredClone(style);
       if (next.sources?.navsea_delivery) {
-        next.sources.navsea_delivery.tiles = [withCacheBuster(PROFILE.deliveryTileUrl, styleVersion)];
+        const tileUrl = deliveryTileUrlOverride || PROFILE.deliveryTileUrl;
+        next.sources.navsea_delivery.tiles = [withCacheBuster(tileUrl, styleVersion)];
       }
       return touchStyleAssets(next);
     }