diff --git a/CHANGELOG.md b/CHANGELOG.md
index d7e7133d..816a0194 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -42,6 +42,13 @@
   quality-check logging.
 - Added a read-only stale-runtime report plus an explicitly confirmed
   reconciliation mode.
+- Deployed immutable build
+  `a28f2497e8d0da7d108828875ba9ffedda3c1688`; live readiness now exposes the
+  exact build identity and reports PostgreSQL, PostGIS 3.6, migration
+  `202607160001`, storage and local YOLO as ready.
+- Completed live Detection Lab acceptance with an intentionally empty raster
+  choice, disabled start action and zero browser console errors. No stale
+  running Job or AnalysisRun remained after reconciliation.
 
 ## Sprint 240 Operational forest, agriculture, nature and soil themes (2026-07-17)
 
diff --git a/docs/CODEX_EXECUTION_LOG.md b/docs/CODEX_EXECUTION_LOG.md
index 14d28e9b..5664f676 100644
--- a/docs/CODEX_EXECUTION_LOG.md
+++ b/docs/CODEX_EXECUTION_LOG.md
@@ -10394,3 +10394,20 @@ Validation:
 - Local `docker compose config` was unavailable because this Windows
   workstation has no Docker CLI; Tower validation remains mandatory before
   RC-3 completion.
+
+## 2026-07-17 - Belgium/North Sea RC-3 live acceptance
+
+- Deployed immutable commit
+  `a28f2497e8d0da7d108828875ba9ffedda3c1688` to Tower.
+- Live readiness reports PostgreSQL, PostGIS 3.6, Alembic head
+  `202607160001`, writable storage and the configured local YOLO capability as
+  ready. The health response exposes the exact commit and build time.
+- `scripts/runtime_state_report.py` executed inside the all-in-one container
+  and found zero running Jobs and zero running AnalysisRuns.
+- Live migration smoke completed against the retained PostGIS volume.
+- In-app browser acceptance opened Detection Lab on port 1202 and confirmed
+  that the raster selector starts empty, exposes nine choices including its
+  placeholder, keeps the primary detection action disabled and produces no
+  console errors or warnings.
+- RC-3 is complete. RC-4 national and maritime coverage contracts are the
+  active roadmap phase.
diff --git a/docs/RC_ROADMAP_BELGIUM_NORTH_SEA.md b/docs/RC_ROADMAP_BELGIUM_NORTH_SEA.md
index 2de9d2cf..c7235c55 100644
--- a/docs/RC_ROADMAP_BELGIUM_NORTH_SEA.md
+++ b/docs/RC_ROADMAP_BELGIUM_NORTH_SEA.md
@@ -146,8 +146,8 @@ editions and licences must still pass source-specific probes before activation.
 | RC-0 | complete | freeze scope and produce release evidence baseline |
 | RC-1 | complete | backup, restore and data safety |
 | RC-2 | complete | health, capabilities and stale-runtime correctness |
-| RC-3 | in progress | temporal detection/QA correctness and observability |
-| RC-4 | pending | national/maritime scope and provider coverage contracts |
+| RC-3 | complete | temporal detection/QA correctness and observability |
+| RC-4 | in progress | national/maritime scope and provider coverage contracts |
 | RC-5 | pending | deployment, secrets, configuration, fresh install and rollback |
 | RC-6 | pending | complete CI, dependency and supply-chain gates |
 | RC-7 | pending | critical API envelope typing and contract validation |
@@ -262,10 +262,15 @@ reconciled five orphaned jobs and two orphaned analysis runs; zero remain
 
 ## RC-3 - Temporal QA correctness and observability
 
-**State: implementation complete; live deployment acceptance pending.** The
-local release gate passes backend compilation, all 974 backend tests, frontend
-typecheck/build, the integrated readiness script, one Alembic head and complete
-offline migration SQL generation.
+**State: complete.** The local release gate passes backend compilation, all
+974 backend tests, frontend typecheck/build, the integrated readiness script,
+one Alembic head and complete offline migration SQL generation. Tower runs
+immutable build `a28f2497e8d0da7d108828875ba9ffedda3c1688`, reports PostgreSQL,
+PostGIS 3.6, migration `202607160001`, storage and configured YOLO as ready,
+and contains no orphaned running Job or AnalysisRun. Live browser acceptance
+proved that Detection Lab starts with an empty raster choice, disables its
+primary action and reports the required operator choice without console
+errors.
 
 ### Work
 
diff --git a/docs/TODO.md b/docs/TODO.md
index e09cc7ca..6f9b07c2 100644
--- a/docs/TODO.md
+++ b/docs/TODO.md
@@ -13,7 +13,7 @@ maritieme zones.
 - [x] RC-1: actuele productiebackup, verificatie en geisoleerde restore bewijzen.
 - [x] RC-2: liveness/readiness/capabilities fail-closed en waarheidsgetrouw maken.
 - [x] RC-2: verweesde jobs en analysis runs na een procesherstart verzoenen.
-- [ ] RC-3: expliciete rasterkeuze en temporeel compatibele detectie-QA afdwingen.
+- [x] RC-3: expliciete rasterkeuze en temporeel compatibele detectie-QA afdwingen.
 - [ ] RC-4: nationale basisdekking, Wallonie, Brussel en Belgische Noordzee via
   beheerde providers en golden areas operationaliseren.
 - [ ] RC-5: secrets/configuratie/uploadlimieten/immutable deploy en rollback