diff --git a/.project/objectives/p3-18-water-crossing-embark-transport.md b/.project/objectives/p3-18-water-crossing-embark-transport.md
index 33d48728..13a6b41c 100644
--- a/.project/objectives/p3-18-water-crossing-embark-transport.md
+++ b/.project/objectives/p3-18-water-crossing-embark-transport.md
@@ -99,18 +99,21 @@ two-tier Civ model on the existing tree (`public/resources/techs/naval.json`):
   entries + emit cases (`unit_panel.gd`) and the signal connections + handlers
   (`world_map.gd`) that P3b orphaned. No dangling refs; no GUT test referenced them.
   Auto-embark is the only embark model across Rust **and** the GDScript UI.
-- [ ] **P5b — rendered-movement embark (functionally required for UI play).** The
-  rendered game moves via `world_map.gd → PathfinderScript.find_path` (GDScript
-  `pathfinder.gd`), so embark works **headless only** today. State is hybrid
-  (GDScript `GameState`/`Player.researched_techs` + a Rust `GdGameState` bridge). To
-  stay single-source (no re-hardcoding tech ids in GDScript — that would undo P1b),
-  add a `GdGameState` `#[func]` returning the Rust-computed `EmbarkLevel` (via
-  `TechWeb::embark_level`), thread it into `pathfinder.gd::_is_passable`/`find_path`/
-  `find_path_with_fog` + the `world_map.gd` callers; also drop the vestigial embark
-  inputs from `legal_actions_for`/`can_invoke`. **Rail-1 alternative (preferred
-  long-term):** route rendered movement through the Rust pathfinder — larger,
-  overlaps the standing `pathfinder.gd` port debt. *(Dylib-gated: `build-gdext.sh`
-  works — gdext crate is `magic-civ-physics-gdext`, `cargo check` green in ~38s — + GUT.)*
+- [x] **P5b — rendered-movement embark (UI).** ✅ Embark now works in the rendered
+  UI, not just headless. Single-source: `GdTechWeb.embark_level(researched)`
+  `#[func]` (`c90ba8719`) returns the Rust-computed level (data-driven
+  `TechWeb::embark_level`); `KnowledgeWeb` + `TechWeb` pass it through;
+  `pathfinder.gd` (`find_path`/`movement_range`/`find_path_with_fog` + `_is_passable`)
+  gained a defaulted `embark_level` and a thin single-tier water gate;
+  `world_map.gd::_current_embark_level()` feeds the active player's level into all
+  four pathfinder call sites (`981996529`). Built + deployed the dylib
+  (`build-gdext.sh aarch64-apple-darwin`, 1m46s) and verified headless: GUT **732
+  passing / 0 failed**, incl. `test_pathfinder_embark.gd` (`18aad5cdf`) — land
+  blocked at water without embark, fords with it, naval unaffected. The precise
+  coast-vs-ocean tier stays authoritative in the Rust sim (UI gate is single-tier
+  to avoid hardcoding the biome→tier map in GDScript). *Minor remaining:* trim the
+  vestigial embark inputs from `legal_actions_for`/`can_invoke` + their GDScript
+  callers (cosmetic; another dylib+GUT cycle).
 - [ ] **P6 — end-to-end (full demo).** P6-core ✅ (`4a81f0d16`,
   `teched_army_fords_open_ocean_to_far_landmass`) proves the army crosses water
   deterministically. P6-full (a headless 1v1 to a decisive `game_over` by crossing