Keep Contacts, active layer intents and mapped sites across globe switches

scripts/package-boundaries.json

@@ -1921,6 +1921,7 @@
       "src/layers/awareness/policy.js",
       "src/layers/awareness/presentation.js",
       "src/layers/awareness/queries.js",
+      "src/layers/awareness/render/cesium.js",
       "src/layers/awareness/rendering.js",
       "src/layers/awareness/state.js",
       "src/layers/awareness/subject.js",
@@ -2806,6 +2807,7 @@
       "src/layers/awareness/policy.js",
       "src/layers/awareness/presentation.js",
       "src/layers/awareness/queries.js",
+      "src/layers/awareness/render/cesium.js",
       "src/layers/awareness/rendering.js",
       "src/layers/awareness/state.js",
       "src/layers/awareness/subject.js",
@@ -3668,6 +3670,7 @@
       "src/layers/earthquakes/render/navaraGeometry.js",
       "src/layers/earthquakes/render/navaraGrid.js",
       "src/layers/installations/render/navara.js",
+      "src/layers/awareness/render/navara.js",
       "src/layers/bikeshare/render/navara.js",
       "src/layers/installations/render/navaraGeometry.js",
       "src/layers/installations/render/navaraOutlineBatch.js",
@@ -3866,6 +3869,7 @@
       "src/layers/awareness/policy.js",
       "src/layers/awareness/presentation.js",
       "src/layers/awareness/queries.js",
+      "src/layers/awareness/render/cesium.js",
       "src/layers/awareness/rendering.js",
       "src/layers/awareness/state.js",
       "src/layers/awareness/subject.js",

scripts/qa-contact-switch.mjs

@@ -0,0 +1,148 @@
+import puppeteer from 'puppeteer';
+import assert from 'node:assert/strict';
+import { blockPaidQaMaps } from './qa-map-policy.mjs';
+
+const base = new URL(process.argv[2]);
+if (
+  !['localhost', '127.0.0.1'].includes(base.hostname) ||
+  ['', '4173', '4185', '4186', '4187', '4188', '4189', '4194'].includes(
+    base.port,
+  )
+)
+  throw new Error('Supply an unreserved local keyless preview URL');
+base.search = '?engine=navara&welcome=0&look=cinematic';
+base.hash =
+  'v=2&lat=43.6500&lon=-79.3800&alt=46000&heading=0&pitch=-90&roll=0&map=sentinel2&l=4';
+const b = await puppeteer.launch({
+  headless: true,
+  args: ['--use-angle=metal', '--enable-gpu'],
+});
+try {
+  const p = await b.newPage();
+  await blockPaidQaMaps(p);
+  await p.setViewport({ width: 1024, height: 768 });
+  const errors = [];
+  p.on('pageerror', (e) => {
+    errors.push(e.message);
+    console.log('error', e.message.split('?')[0]);
+  });
+  await p.evaluateOnNewDocument(() => {
+    const fetch = window.fetch.bind(window);
+    window.fetch = (input, options) => {
+      const { pathname } = new URL(input.url ?? input, document.baseURI);
+      if (pathname === '/api/vessels')
+        return Promise.resolve(
+          Response.json({
+            status: 'live',
+            rows: ['123456789', '223456789'].map((mmsi, i) => ({
+              mmsi,
+              name: 'Toronto ' + i,
+              lat: 43.65,
+              lon: -79.38 + i * 0.05,
+              last_position_epoch: Date.now() / 1000,
+            })),
+          }),
+        );
+      if (pathname === '/api/vessels/track')
+        return Promise.resolve(Response.json({ samples: [] }));
+      if (pathname === '/api/flights')
+        return Promise.resolve(
+          Response.json({ time: Date.now() / 1000, states: [] }),
+        );
+      if (pathname === '/api/military')
+        return Promise.resolve(Response.json({ now: Date.now(), ac: [] }));
+      if (pathname === '/api/military-installations')
+        return Promise.resolve(Response.json({ elements: [], status: 'ok' }));
+      return fetch(input, options);
+    };
+  });
+  await p.goto(base.href);
+  const ready = async (kind) => {
+    await p.waitForFunction(
+      (k) =>
+        window.__godsEyeView?.engine.kind === k &&
+        !document.querySelector('#globe-engine')?.disabled &&
+        !document.querySelector('.engine-switch-frame') &&
+        document.querySelector('#loading-screen.hidden'),
+      { timeout: 90000 },
+      kind,
+    );
+    await p.evaluate(
+      () => window.__godsEyeView.styleManager.initialRestorePromise,
+    );
+  };
+  await ready('navara');
+  await p.evaluate(async () => {
+    const { dataManager, styleManager, tileset } = window.__godsEyeView;
+    if (tileset || window.__GOOGLE_MAPS_API_KEY__)
+      throw Error('Require keyless preview');
+    await dataManager.setEnabled('ais-live-vessels', true, { origin: 'user' });
+    window.qaBefore = [...dataManager.getEnabledLayerIds()].sort();
+    const outcome = await styleManager.setContextMode('contacts');
+    if (!outcome.ok) throw Error(JSON.stringify(outcome));
+    window.qaContext = dataManager.layers.get('military-awareness').module;
+    window.qaSites = dataManager.layers.get('military-installations').module;
+    const vessels = dataManager.layers.get('ais-live-vessels').module;
+    if (!vessels.selectById('123456789')) throw Error('Missing first vessel');
+    if (!window.qaContext.navigateNext({ targetLayer: 'ais-live-vessels' }))
+      throw Error('Cannot navigate to the second vessel');
+  });
+  const sample = () =>
+    p.evaluate(() => {
+      const { dataManager, styleManager, engine } = window.__godsEyeView;
+      return {
+        context:
+          window.qaContext ===
+          dataManager.layers.get('military-awareness').module,
+        sites:
+          window.qaSites ===
+          dataManager.layers.get('military-installations').module,
+        mode: styleManager.getContextModeState().mode,
+        subject: window.qaContext.getContextSnapshot()?.subject?.id,
+        history:
+          window.qaContext._getAwarenessNavigationStateForTest().historyKeys,
+        enabled: [...dataManager.getEnabledLayerIds()].sort(),
+        ring:
+          engine.kind === 'navara'
+            ? engine.lines
+                .list()
+                .filter((line) => line.id === 'gev-awareness-rim').length
+            : null,
+      };
+    });
+  const baseline = await sample();
+  console.log('baseline', JSON.stringify(baseline));
+  assert.equal(baseline.mode, 'flights');
+  assert.equal(baseline.subject, '223456789');
+  assert.ok(baseline.history.includes('ais-live-vessels:123456789'));
+  assert.ok(baseline.ring >= 1);
+  for (const kind of ['cesium', 'navara']) {
+    await p.select('#globe-engine', kind);
+    await ready(kind);
+    const current = await sample();
+    console.log('handoff', kind, JSON.stringify(current));
+    assert.deepEqual(current, {
+      ...baseline,
+      ring: kind === 'navara' ? baseline.ring : null,
+    });
+  }
+  const restored = await p.evaluate(async () => {
+    const { dataManager, styleManager } = window.__godsEyeView;
+    const result = await styleManager.setContextMode('off');
+    return (
+      result.ok &&
+      JSON.stringify([...dataManager.getEnabledLayerIds()].sort()) ===
+        JSON.stringify(window.qaBefore)
+    );
+  });
+  assert.ok(
+    restored,
+    'Restore layers enabled by the user before entering Contacts',
+  );
+  assert.deepEqual(errors, []);
+  console.log(
+    'PASS Contacts history, dependency ownership and exit restore across both globes',
+  );
+} finally {
+  await b.close();
+}

src/app/constructCatalog.js

@@ -140,10 +140,12 @@ export function createApplicationCatalog({
       ),
     );
     const installations = once(() =>
+      sessionModel('military-installations', () =>
         createApplicationInstallations({
           surface,
           source: sources.installations,
         }),
+      ),
     );
     const satellites = once(() =>
       createApplicationSatellites({
@@ -261,13 +263,14 @@ export function createApplicationCatalog({
       ['military-installations', installations],
       [
         'military-awareness',
-        () =>
+        () => sessionModel('military-awareness', () =>
           createApplicationAwareness({
             flights: flights(),
             military: military(),
             vessels: vessels(),
             installations: installations(),
           }),
+        ),
       ],
       [
         'wind',

src/app/controls.js

@@ -21,6 +21,7 @@ export function createApplicationControls({
   initialShareCode = null,
   localePicker = true,
   engineSwitch = false,
+  layerSession,
 }) {
   // Initialize the style manager (post-processing, HUD, locations, share links)
   const styleManager = new Controls(viewer, {
@@ -42,6 +43,7 @@ export function createApplicationControls({
     // A share code to open at start-up instead of the page's address.
     initialShareCode,
     engineSwitch,
+    layerSession,
     localePicker,
   });
   defer(() => styleManager.orbitController.stop());

src/app/data.js

@@ -45,7 +45,7 @@ export function createApplicationData({
   onData?.(dataManager);
   if (!catalog?.layers || !catalog?.metadata)
     throw new TypeError('An application layer catalog is required');
-  dataManager.bindCatalog(viewer, engine, catalog);
+  const attached = dataManager.bindCatalog(viewer, engine, catalog);
   for (const layer of catalog.layers) layer.attachDataManager?.(dataManager);
   for (const layer of catalog.layers)
     layer.attachMapStackController?.(mapStackController);
@@ -75,5 +75,6 @@ export function createApplicationData({
   // The sonar scene draws on the viewer; the Navara engine has none.
   if (viewer) defer(createCyberSonarScene(viewer, dataManager));
 
-  return { dataManager, catalog, presentation };
+  const data = { dataManager, catalog, presentation };
+  return attached ? attached.then(() => data) : data;
 }

src/app/layers/militaryAwareness.js

@@ -1,3 +1,4 @@
+import { rendererFor } from './renderers.js';
 import { createAwarenessLayer } from '../../layers/awareness/index.js';
 import * as navigation from '../../navigationPolicy.js';
 import * as geometry from '../../celestialRing.js';
@@ -17,6 +18,7 @@ export function createApplicationAwareness({
       installations,
       navigation,
       geometry,
+      renderer: (engine) => rendererFor('military-awareness', engine),
       render,
     },
   });

src/app/navaraLayers.test.mjs

@@ -60,6 +60,7 @@ test('the Navara mode registers migrated renderers once', async () => {
       'recent-imagery',
       'ais-live-vessels',
       'military-installations',
+      'military-awareness',
       'local-firms',
     ],
   );

src/app/navaraMode.js

@@ -106,6 +106,8 @@ export async function registerNavaraLayerRenderers() {
     bikeshare: async () =>
       (await import('../layers/bikeshare/render/navara.js'))
         .createBikeshareNavaraRenderer,
+    'military-awareness': async () =>
+      (await import('../layers/awareness/render/navara.js')).createAwarenessNavaraRenderer,
     'military-installations': async () => {
       const { createInstallationsNavaraRenderer } =
         await import('../layers/installations/render/navara.js');

src/data/layerStateCoordinator.js

@@ -102,6 +102,7 @@ export class LayerStateCoordinator {
   start({
     shareLayerState = null,
     allowLocalState = true,
+    handoffLayers = null,
     shareCreatedAtMs = null,
   } = {}) {
     if (this._destroyed)
@@ -139,11 +140,12 @@ export class LayerStateCoordinator {
     );
     this.shareLinkManager?.onLayerStateChange?.();
     this._notifyDurableState();
-    if (!selected) return this.restorePromise;
+    if (!selected && !handoffLayers) return this.restorePromise;
     this.restorePromise = this._restoreSelectedState(
       this._source === 'share'
         ? LAYER_RESTORE_ORIGINS.share
         : LAYER_RESTORE_ORIGINS.local,
+      handoffLayers,
     );
     return this.restorePromise;
   }
@@ -365,7 +367,7 @@ export class LayerStateCoordinator {
       : this.restoreGate);
   }
 
-  async _restoreSelectedState(origin) {
+  async _restoreSelectedState(origin, handoffLayers = null) {
     // One controller set per run: a superseded run must not clear the newer
     // run's controllers when it settles.
     const controllers = new Map();
@@ -379,7 +381,18 @@ export class LayerStateCoordinator {
       const settled = await Promise.allSettled(
         LAYER_STATE_REGISTRY.map(async (entry) => {
           const controller = controllers.get(entry.id);
-          const targetEnabled = enabled.has(entry.id);
+          const live = handoffLayers?.get(entry.id);
+          const targetEnabled = live?.enabled ?? enabled.has(entry.id);
+          // A same-document engine choice retains operational layer intents.
+          // The share still owns durable preferences and later history visits.
+          if (live && this.dataManager.layers.get(entry.id) === live.entry &&
+              !live.entry.lifecycleUncertain && live.entry.enabled === targetEnabled) {
+            return {
+              layerId: entry.id, targetEnabled, origin, phase: 'retained',
+              ...currentLayerOutcome(this.dataManager, entry.id),
+              appliedOptions: {}, persistenceWrite: false, succeeded: true,
+            };
+          }
           const options = layerOptionsForRestore(this._durableState, entry.id);
           if (origin === LAYER_RESTORE_ORIGINS.share && options) {
             for (const trackingKey of Object.values(

src/data/lifecycle.js

@@ -147,12 +147,16 @@ export class LayerLifecycle {
     this.viewer = viewer;
     this.engine = engine ?? engineFromViewer(viewer) ?? null;
     this._catalogSourceAvailability = catalog.getSourceAvailability;
+    const attachments = [];
     for (const layer of catalog.layers) {
       const entry = this.layers.get(layer.id);
       if (!entry) this.register(layer);
       else {
         if (entry.module !== layer) throw new Error(`Layer owner changed: ${layer.id}`);
-        if (entry.initialized) layer.attachRenderer(viewer, this._moduleContext());
+        if (entry.initialized) {
+          const ready = layer.attachRenderer(viewer, this._moduleContext());
+          if (ready?.then) attachments.push(ready);
+        }
       }
     }
     // Retained entries may appear anywhere in the directory. Preserve both
@@ -163,6 +167,7 @@ export class LayerLifecycle {
       this.layers.set(id, entry);
     }
     this.finalizeRegistrations(catalog.metadata);
+    if (attachments.length) return Promise.all(attachments);
   }
 
   /** Register a synthetic layer after sealing in an explicitly dev-enabled manager. */

src/data/militaryAwareness.test.mjs

@@ -1984,18 +1984,6 @@ test('cockpit blocks only non-aircraft Context camera flights', () => {
   );
 });
 
-test('vessel entry and selection framing both use the 3 km focus radius', () => {
-  assert.match(
-    militaryAwarenessSource,
-    /const\s*VESSEL_FOCUS_RADIUS_M\s*=\s*3000;/,
-  );
-  const focusRadiusUses =
-    militaryAwarenessSource.match(
-      /new\s*Cesium\.BoundingSphere\(\s*vessel\.position,\s*VESSEL_FOCUS_RADIUS_M,?\s*\)/g,
-    ) || [];
-  assert.equal(focusRadiusUses.length, 2);
-});
-
 test('awareness rescans only for invalidation, source change, or meaningful movement', () => {
   assert.equal(
     awarenessRefreshRequired({
@@ -3081,6 +3069,7 @@ test('every Context camera flight without a tracked entity takes navigation auth
     assert.deepEqual(taken, ['context-vessel-focus']);
     // The announcement precedes the flight, never trails it.
     assert.equal(runtime.cameraFlights.length, 1);
+    assert.equal(runtime.cameraFlights[0].sphere.radius, 3000);
 
     militaryAwarenessLayer.focusTarget('military-installations', 'inst-1');
     assert.deepEqual(taken, [
@@ -3119,6 +3108,7 @@ test('Contacts vessel autofocus takes navigation authority before it frames', as
     // Activation enables dependencies before it auto-focuses.
     await new Promise((resolve) => setTimeout(resolve, 0));
     assert.equal(runtime.cameraFlights.length, 1, 'autofocus framed a vessel');
+    assert.equal(runtime.cameraFlights[0].sphere.radius, 3000);
     assert.deepEqual(taken, [
       {
         reason: 'context-vessel-autofocus',

src/layers/awareness/directionOverlay.test.mjs

@@ -18,9 +18,9 @@ function overlay(screenAngle) {
   const container = document.body.appendChild(document.createElement('div'));
   const subject = Cesium.Cartesian3.fromDegrees(0, 0, 1000);
   Object.assign(state, {
-    viewer: {
+    display: {
       container,
-      scene: { canvas: { clientWidth: 800, clientHeight: 600 } },
+      canvas: { clientWidth: 800, clientHeight: 600 },
       camera: {
         heading: 0,
         rightWC: new Cesium.Cartesian3(0, 1, 0),
@@ -115,7 +115,7 @@ test('an unstable frame keeps the last stable bearing, until the overlay is remo
   rendering.updateDirectionOverlay();
   assert.equal(state.directionAngles[0], 1);
   // The heading turns, so the next frame recomputes the contact.
-  state.viewer.camera.heading = 0.1;
+  state.display.camera.heading = 0.1;
   rendering.updateDirectionOverlay();
   assert.equal(previous[1], 1, 'the unstable frame is given the last angle');
   assert.equal(state.directionAngles[0], 1, 'and does not replace it');

src/layers/awareness/focus.js

@@ -1,4 +1,3 @@
-import * as Cesium from 'cesium';
 import * as geo from '../../geo/index.js';
 import { VESSEL_FOCUS_RADIUS_M } from './policy.js';
 
@@ -42,14 +41,11 @@ export function createFocus({ state: layerState, services, parts, source }) {
     if (
       !parts.model.contextTargetFlyToAllowed(layerId) ||
       !vessel?.position ||
-      !layerState.viewer
+      !layerState.display
     )
       return true;
     announceNavigationAuthority('context-vessel-focus');
-    layerState.viewer.camera.flyToBoundingSphere(
+    layerState.display.frameContact(vessel.position, VESSEL_FOCUS_RADIUS_M, 1.4);
-      new Cesium.BoundingSphere(vessel.position, VESSEL_FOCUS_RADIUS_M),
-      { duration: 1.4 },
-    );
     return true;
   }
 
@@ -113,7 +109,7 @@ export function createFocus({ state: layerState, services, parts, source }) {
 
   function closestToCurrentView(candidates) {
     if (!Array.isArray(candidates) || !candidates.length) return null;
-    const cameraPosition = layerState.viewer?.camera?.positionWC;
+    const cameraPosition = layerState.display?.camera?.positionWC;
     if (!cameraPosition)
       return candidates.find((candidate) => candidate?.position) || null;
 
@@ -146,7 +142,7 @@ export function createFocus({ state: layerState, services, parts, source }) {
     if (
       !layerState.enabled ||
       layerState.subject ||
-      !layerState.viewer ||
+      !layerState.display ||
       layerState.autoFocusAttempted
     )
       return false;
@@ -181,10 +177,7 @@ export function createFocus({ state: layerState, services, parts, source }) {
     announceNavigationAuthority('context-vessel-autofocus', {
       cancelPendingSelection: false,
     });
-    layerState.viewer.camera.flyToBoundingSphere(
+    layerState.display.frameContact(vessel.position, VESSEL_FOCUS_RADIUS_M, 1.6);
-      new Cesium.BoundingSphere(vessel.position, VESSEL_FOCUS_RADIUS_M),
-      { duration: 1.6 },
-    );
     return true;
   }
   return {

src/layers/awareness/lifecycle.js

@@ -1,3 +1,4 @@
+import { createAwarenessCesiumRenderer } from './render/cesium.js';
 import { cameraPoseSignature } from '../../data/iconOrientation.js';
 
 export function createLifecycle({
@@ -36,7 +37,7 @@ export function createLifecycle({
   }
 
   function attachRuntimeListeners() {
-    if (layerState.runtimeListenersAttached || !layerState.viewer) return;
+    if (layerState.runtimeListenersAttached || !layerState.display) return;
     window.addEventListener(
       'gev:awareness-subject-selected',
       layerState.subjectListener,
@@ -51,14 +52,14 @@ export function createLifecycle({
       layerState.subjectClearListener,
     );
     layerState.preRenderRemover =
-      layerState.viewer.scene.preRender.addEventListener(() => {
+      layerState.display.onFrame(() => {
         if (!layerState.enabled) return;
         const now = Date.now();
         // "Did the camera move" uses the SAME quantized pose signature the fleet
         // rotation pass gates on (iconOrientation.cameraPoseSignature) rather than
         // camera.changed, whose granularity is globally degraded by other layers
         // mutating camera.percentageChanged.
-        const poseSig = cameraMotionSignature(layerState.viewer.camera);
+        const poseSig = cameraMotionSignature(layerState.display.camera);
         if (poseSig !== layerState.lastCameraPoseSig) {
           layerState.lastCameraPoseSig = poseSig;
           layerState.lastCameraPoseChangeMs = now;
@@ -121,9 +122,7 @@ export function createLifecycle({
     layerState.runtimeListenersAttached = false;
   }
   const methods = {
-    init(viewer) {
+    init(viewer, { engine = null } = {}) {
-      detachRuntimeListeners();
-      layerState.viewer = viewer;
       layerState.subjectListener = (event) => {
         if (!layerState.enabled) return;
         parts.subject.selectSubject(event.detail);
@@ -177,6 +176,28 @@ export function createLifecycle({
           parts.subject.clearAwarenessSubject();
         }
       };
+      if (viewer || engine) this.attachRenderer(viewer, { engine });
+    },
+
+    attachRenderer(viewer, { engine = null } = {}) {
+      detachRuntimeListeners();
+      layerState.display?.destroy?.();
+      layerState.display = viewer
+        ? createAwarenessCesiumRenderer(viewer)
+        : services.renderer?.(engine) ?? null;
+      if (layerState.enabled) {
+        attachRuntimeListeners();
+        if (layerState.subject) parts.rendering.renderVisual(layerState.subject);
+        parts.rendering.scheduleDirectionOverlayUpdate(true);
+      }
+    },
+
+    detachRenderer() {
+      detachRuntimeListeners();
+      parts.rendering.clearVisual();
+      parts.rendering.removeDirectionOverlay();
+      layerState.display?.destroy?.();
+      layerState.display = null;
     },
 
     enable() {
@@ -235,7 +256,8 @@ export function createLifecycle({
       layerState.contextListener = null;
       layerState.clearListener = null;
       layerState.subjectClearListener = null;
-      layerState.viewer = null;
+      layerState.display?.destroy?.();
+      layerState.display = null;
       layerState.dataManager = null;
     },
   };

src/layers/awareness/render/cesium.js

@@ -0,0 +1,40 @@
+import { BoundingSphere, Color } from 'cesium';
+import { AWARENESS_RADIUS_M } from '../../../data/militaryAwarenessEngine.js';
+import { CONTEXT_RIM_HEIGHT_M } from '../policy.js';
+
+export function createAwarenessCesiumRenderer(viewer) {
+  return {
+    container: viewer.container,
+    get canvas() {
+      return viewer.scene?.canvas;
+    },
+    get camera() {
+      return viewer.camera;
+    },
+    get trackedEntity() {
+      return viewer.trackedEntity;
+    },
+    onFrame: (run) => viewer.scene.preRender.addEventListener(run),
+    frameContact: (center, radius, duration) =>
+      viewer.camera.flyToBoundingSphere(new BoundingSphere(center, radius), {
+        duration,
+      }),
+    createRim(center) {
+      const entity = viewer.entities.add({
+        position: center,
+        ellipse: {
+          semiMajorAxis: AWARENESS_RADIUS_M,
+          semiMinorAxis: AWARENESS_RADIUS_M,
+          fill: false,
+          outline: true,
+          outlineColor: Color.fromCssColorString('#62b5ff').withAlpha(0.72),
+          height: CONTEXT_RIM_HEIGHT_M,
+        },
+      });
+      return {
+        move: (next) => entity.position.setValue(next),
+        destroy: () => viewer.entities.remove(entity),
+      };
+    },
+  };
+}

src/layers/awareness/render/navara.js

@@ -0,0 +1,63 @@
+import * as geo from '../../../geo/index.js';
+import { createEngineLayerView } from '../../shared/render/engineView.js';
+import { AWARENESS_RADIUS_M } from '../../../data/militaryAwarenessEngine.js';
+import { CONTEXT_RIM_HEIGHT_M } from '../policy.js';
+
+// Sample in the subject's east/north plane, then lift each vertex onto
+// the ellipsoid. This also works when a ring crosses the date line or a pole.
+function rimPositions(center) {
+  const frame = geo.transforms.eastNorthUpToFixedFrame(center);
+  const positions = [];
+  for (let i = 0; i < 180; i++) {
+    const angle = (i * Math.PI) / 90;
+    const local = geo.cartesian3.create(
+      Math.cos(angle) * AWARENESS_RADIUS_M,
+      Math.sin(angle) * AWARENESS_RADIUS_M,
+      0,
+    );
+    const world = geo.matrix4.multiplyByPoint(
+      frame,
+      local,
+      geo.cartesian3.create(),
+    );
+    const point = geo.cartographic.fromCartesian(world);
+    positions.push(
+      geo.cartesian3.fromRadians(
+        point.longitude,
+        point.latitude,
+        CONTEXT_RIM_HEIGHT_M,
+      ),
+    );
+  }
+  positions.push(positions[0]);
+  return positions;
+}
+
+export function createAwarenessNavaraRenderer(engine) {
+  const binding = createEngineLayerView(engine, {
+    layerId: 'military-awareness',
+  });
+  return {
+    container: engine.host.container,
+    canvas: engine.host.canvas,
+    camera: binding.view.camera,
+    get trackedEntity() {
+      return engine.camera.following()?.native;
+    },
+    onFrame: (run) => binding.view.on('preRender', run),
+    frameContact: (center, radius, duration) =>
+      engine.camera.flyToSphere({ center, radius }, { duration }),
+    createRim(center) {
+      const line = engine.lines.createLine({
+        id: 'gev-awareness-rim',
+        color: [98 / 255, 181 / 255, 1, 0.72],
+        widthPx: 1,
+        arc: 'geodesic',
+      });
+      const move = (position) => line.setPositions(rimPositions(position));
+      move(center);
+      return { move, destroy: () => line.destroy() };
+    },
+    destroy: binding.destroy,
+  };
+}

src/layers/awareness/rendering.js

@@ -1,4 +1,3 @@
-import * as Cesium from 'cesium';
 import * as geo from '../../geo/index.js';
 import { t } from '../../i18n/index.js';
 import {
@@ -8,10 +7,9 @@ import {
 import {
   formatAwarenessLabel,
   formatAwarenessDistance,
-  AWARENESS_RADIUS_M,
 } from '../../data/militaryAwarenessEngine.js';
 import { bearingBetweenCoordinates } from '../../cockpitMath.js';
-import { AWARENESS_PAGE_SIZE, CONTEXT_RIM_HEIGHT_M } from './policy.js';
+import { AWARENESS_PAGE_SIZE } from './policy.js';
 import { formatAwarenessDirection } from './presentation.js';
 
 export function createRendering({
@@ -36,10 +34,10 @@ export function createRendering({
    * viewer's container. Each part keeps its last placement while hidden.
    */
   function ensureDirectionOverlay() {
-    if (layerState.directionView || !layerState.viewer)
+    if (layerState.directionView || !layerState.display)
       return layerState.directionView;
     presentDirection({
-      container: layerState.viewer.container,
+      container: layerState.display.container,
       hidden: true,
       ring: null,
       heading: { text: '', left: null, top: null },
@@ -129,7 +127,7 @@ export function createRendering({
       return;
     }
 
-    const canvas = layerState.viewer.scene.canvas;
+    const canvas = layerState.display.canvas;
     const width = canvas.clientWidth || canvas.width;
     const height = canvas.clientHeight || canvas.height;
     const sonar = isCyberSonarActive()
@@ -147,7 +145,7 @@ export function createRendering({
       120,
       Math.min(geometry.radius - 48, geometry.radius * 0.66),
     );
-    const cameraHeading = layerState.viewer.camera.heading || 0;
+    const cameraHeading = layerState.display.camera.heading || 0;
     const headingDeg =
       (Math.round(geo.math.toDegrees(cameraHeading)) + 360) % 360;
     const ring = {
@@ -205,8 +203,8 @@ export function createRendering({
       }
       geo.cartesian3.normalize(direction, direction);
       const projection = celestialScreenAngle(
-        geo.cartesian3.dot(direction, layerState.viewer.camera.rightWC),
+        geo.cartesian3.dot(direction, layerState.display.camera.rightWC),
-        geo.cartesian3.dot(direction, layerState.viewer.camera.upWC),
+        geo.cartesian3.dot(direction, layerState.display.camera.upWC),
         layerState.directionAngles[index],
       );
       if (projection.stable)
@@ -234,12 +232,12 @@ export function createRendering({
         transform: `translate(-50%, -50%) translate(${-Math.cos(projection.angle) * 56}px, ${-Math.sin(projection.angle) * 56}px)`,
       };
       const label = formatAwarenessLabel(item);
-      const subjectCartographic = Cesium.Cartographic.fromCartesian(
+      const subjectCartographic = geo.cartographic.fromCartesian(
         layerState.subject.position,
         undefined,
         layerState.SUBJECT_CARTOGRAPHIC_SCRATCH,
       );
-      const targetCartographic = Cesium.Cartographic.fromCartesian(
+      const targetCartographic = geo.cartographic.fromCartesian(
         item.position,
         undefined,
         layerState.TARGET_CARTOGRAPHIC_SCRATCH[index],
@@ -273,9 +271,8 @@ export function createRendering({
   }
 
   function clearVisual() {
-    if (layerState.visual?.entities && layerState.viewer) {
+    if (layerState.visual) {
-      for (const entity of layerState.visual.entities)
+      layerState.visual.rim.destroy();
-        layerState.viewer.entities.remove(entity);
       // Idle mode renders only on request; a removed ring must not linger.
       governorRequestRender('awareness-visual');
     }
@@ -283,8 +280,8 @@ export function createRendering({
   }
 
   function renderVisual(subject) {
-    if (!layerState.viewer || !subject?.position) return;
+    if (!layerState.display || !subject?.position) return;
-    const cartographic = Cesium.Cartographic.fromCartesian(subject.position);
+    const cartographic = geo.cartographic.fromCartesian(subject.position);
     if (!cartographic) return;
     const groundCenter = geo.cartesian3.fromRadians(
       cartographic.longitude,
@@ -299,8 +296,7 @@ export function createRendering({
       if (
         geo.cartesian3.distance(layerState.visual.center, groundCenter) >= 250
       ) {
-        for (const entity of layerState.visual.entities)
+        layerState.visual.rim.move(groundCenter);
-          entity.position.setValue(groundCenter);
         geo.cartesian3.clone(groundCenter, layerState.visual.center);
         // Content actually changed — buy exactly one frame instead of holding.
         governorRequestRender('awareness-visual');
@@ -309,26 +305,9 @@ export function createRendering({
     }
     clearVisual();
 
-    const entities = [];
-
-    entities.push(
-      layerState.viewer.entities.add({
-        position: groundCenter,
-        ellipse: {
-          semiMajorAxis: AWARENESS_RADIUS_M,
-          semiMinorAxis: AWARENESS_RADIUS_M,
-          fill: false,
-          outline: true,
-          outlineColor:
-            Cesium.Color.fromCssColorString('#62b5ff').withAlpha(0.72),
-          height: CONTEXT_RIM_HEIGHT_M,
-        },
-      }),
-    );
-
     layerState.visual = {
       key,
-      entities,
+      rim: layerState.display.createRim(groundCenter),
       center: geo.cartesian3.clone(groundCenter),
     };
     governorRequestRender('awareness-visual');

src/layers/awareness/state.js

@@ -14,7 +14,7 @@ export function createState({ services }) {
   );
 
   Object.assign(state, {
-    viewer: null,
+    display: null,
     dataManager: null,
     enabled: false,
     // Set once a refresh observes the subject gone from a still-reporting source.

src/layers/awareness/subject.js

@@ -193,7 +193,7 @@ export function createSubject({ state: layerState, services, parts, source }) {
 
   function currentTrackedFlightSubject() {
     const trackedKey = normalizeContextId(
-      layerState.viewer?.trackedEntity?.gevTrackedId,
+      layerState.display?.trackedEntity?.gevTrackedId,
     );
     if (!trackedKey) return null;
     const subjects = [
@@ -262,14 +262,14 @@ export function createSubject({ state: layerState, services, parts, source }) {
     if (!subject?.position) return null;
     if (subject.layerId === 'flights' || subject.layerId === 'military') {
       const trackedPosition =
-        layerState.viewer?.trackedEntity?.gevDisplayPosition?.();
+        layerState.display?.trackedEntity?.gevDisplayPosition?.();
       if (trackedPosition) {
         return {
           position: Cesium.Cartesian3.clone(trackedPosition),
           // Only the follow camera's own contact proves presence this way; a
           // different tracked entity says nothing about this subject.
           presence:
-            String(layerState.viewer?.trackedEntity?.gevTrackedId || '') ===
+            String(layerState.display?.trackedEntity?.gevTrackedId || '') ===
             subjectKey(subject)
               ? SUBJECT_PRESENCE.LIVE
               : SUBJECT_PRESENCE.UNCHECKED,

src/layers/installations/controls.js

@@ -49,7 +49,7 @@ export function createControls({ state: layerState, services, parts, source }) {
     statsRefreshInterval: 1000,
 
     visitNamedMarkers(visitor) {
-      parts.namedMarkers.visit(visitor);
+      parts.namedMarkers?.visit(visitor);
     },
 
     /** Request a one-shot Google Maps Places search around the current map view. */
@@ -153,7 +153,7 @@ export function createControls({ state: layerState, services, parts, source }) {
           position: geo.cartesian3.fromDegrees(
             record.longitude,
             record.latitude,
-            parts.rendering.installationSurfaceHeightM(record),
+            parts.model.installationSurfaceHeightM(record),
           ),
           distanceM,
         });
@@ -184,7 +184,7 @@ export function createControls({ state: layerState, services, parts, source }) {
         center: geo.cartesian3.fromDegrees(
           record.longitude,
           record.latitude,
-          parts.rendering.installationSurfaceHeightM(record),
+          parts.model.installationSurfaceHeightM(record),
         ),
         radius: 18000,
       };

src/layers/installations/controls.test.mjs

@@ -21,7 +21,7 @@ test('focus frames a selected installation through the globe engine camera', ()
     services: {},
     parts: {
       selection: { selectRecord: (id) => id === record.id },
-      rendering: { installationSurfaceHeightM: () => 126 },
+      model: { installationSurfaceHeightM: () => 126 },
     },
     source: {},
   }).methods;

src/layers/installations/index.js

@@ -28,6 +28,9 @@ export function createInstallationsLayer({
   let renderer = null;
   const lifecycle = {
     init(viewer, options = {}) {
+      if (viewer || options.engine) return lifecycle.attachRenderer(viewer, options);
+    },
+    attachRenderer(viewer, options = {}) {
       if (renderer)
         throw new Error('Installations layer is already initialized');
       const engine = options.engine ?? null;
@@ -35,27 +38,47 @@ export function createInstallationsLayer({
       if (!renderer?.lifecycle?.methods)
         throw new Error('Installation renderer is unavailable');
       Object.assign(parts, renderer);
-      return renderer.lifecycle.methods.init(viewer, options);
+      const ready = renderer.lifecycle.methods.init(viewer, options);
+      if (state.enabled) {
+        renderer.lifecycle.methods.enable();
+        renderer.rendering.renderRecords({ claimSelection: Boolean(state.selectedId) });
+      }
+      return ready;
     },
     enable(...args) {
+      state.enabled = true;
       return renderer?.lifecycle?.methods.enable(...args);
     },
     disable(...args) {
-      return renderer?.lifecycle?.methods.disable(...args);
+      if (renderer) return renderer.lifecycle.methods.disable(...args);
+      state.enabled = false;
+      state.abort?.abort();
+      state.abort = null;
+      state.loading = false;
+      state.selectedId = null;
+      state.contextAnchor = null;
+      state.contextPosition = null;
+      state.cameraLoadKey = null;
+      state.cameraLoadOwner = null;
+      state.coverage = { kind: 'viewport' };
+      clearTimeout(state.timer);
+      parts.viewport.clearUnavailableRetry();
+      services.context.clearSelectedEntityContextForLayer('military-installations');
+      parts.ingestion.setInstallationStatus('idle');
+    },
+    detachRenderer(viewer) {
+      renderer?.lifecycle.methods.detach(viewer);
+      renderer = null;
+      for (const key of ['rendering', 'namedMarkers', 'selection', 'lifecycle'])
+        delete parts[key];
     },
     destroy(...args) {
-      try {
+      if (renderer) renderer.lifecycle.methods.destroy(...args);
-        return renderer?.lifecycle?.methods.destroy(...args);
+      else {
-      } finally {
+        lifecycle.disable();
-        renderer = null;
+        source.destroy?.();
-        for (const key of [
-          'rendering',
-          'namedMarkers',
-          'selection',
-          'lifecycle',
-        ])
-          delete parts[key];
       }
+      renderer = null;
     },
   };
   return Object.assign(

src/layers/installations/ingestion.js

@@ -73,8 +73,7 @@ export function createIngestion({
   }
 
   async function loadInstallations() {
-    if (!layerState.enabled || (!layerState.viewer && !layerState.engine))
+    if (!layerState.enabled) return;
-      return;
     const { box, coverage } = parts.viewport.loadArea(layerState.viewer);
     // Guidance, not a fault: the layer chose not to query because the view is
     // unbounded (a global view, or Cockpit looking at the horizon). Keep it out
@@ -261,8 +260,8 @@ export function createIngestion({
               ? msg('Too many mapped sites in view to list them all')
               : placesError,
         );
-        parts.rendering.renderRecords();
+        parts.rendering?.renderRecords();
-        parts.rendering.warmInstallationFloors(
+        parts.rendering?.warmInstallationFloors(
           layerState.records.filter((r) => !r.pointOnly),
         );
       };

src/layers/installations/model.js

@@ -44,11 +44,11 @@ export function createModel({ state: layerState, services, parts, source }) {
   }
 
   function installationSurfaceHeightM(record) {
-    const floor = services.ground?.cachedGroundFloor?.(
+    const floor = services?.ground?.cachedGroundFloor?.(
       record?.latitude,
       record?.longitude,
     );
-    return services.ground?.floorAltitudeM?.(null, floor) ?? 0;
+    return services?.ground?.floorAltitudeM?.(null, floor) ?? 0;
   }
 
   /**

src/layers/installations/namedMarkers.test.mjs

@@ -55,10 +55,11 @@ test('Contacts camera motion reprojects and declutters existing labels without s
   h.setX(600); h.lifecycle.enable();
   assert.equal(h.labels.length, 2);
   assert.equal(h.publications(), 5);
+  const oldScene = h.state.viewer.scene;
   h.lifecycle.destroy(h.state.viewer);
   assert.equal(h.camera.changed.numberOfListeners, 0);
   assert.equal(h.camera.moveEnd.numberOfListeners, 0);
-  assert.equal(h.state.viewer.scene.preRender.numberOfListeners, 0);
+  assert.equal(oldScene.preRender.numberOfListeners, 0);
 });
 
 test('wide named markers retain primitives until close polygons publish with the same identity', async (t) => {

src/layers/installations/render/cesium/lifecycle.js

@@ -92,11 +92,19 @@ export function createLifecycle({
     destroy(viewer) {
       source.destroy?.();
       this.disable();
-      layerState.contextAnchor = null;
+      this.detach(viewer);
-      layerState.contextPosition = null;
+    },
-      layerState.coverage = { kind: 'viewport' };
+
+    detach(viewer) {
+      services.credits?.hideOsmCredit?.(viewer, LAYER_ID);
+      services.credits?.hideGooglePlacesCredit?.(viewer, LAYER_ID);
+      unregisterPickOwner(LAYER_ID);
+      releaseCameraSensitivity(viewer?.camera, LAYER_ID);
+      layerState.surfaceChangedRemove?.();
+      layerState.surfaceChangedRemove = null;
       layerState.moveEndRemove?.();
       layerState.changedRemove?.();
+      layerState.moveEndRemove = layerState.changedRemove = null;
       parts.selection.destroy?.();
       layerState.clickHandler?.destroy();
       layerState.clickHandler = null;
@@ -105,6 +113,7 @@ export function createLifecycle({
       if (layerState.dataSource && viewer)
         viewer.dataSources.remove(layerState.dataSource, true);
       layerState.dataSource = null;
+      layerState.viewer = null;
       layerState.engine = null;
     },
   };

src/layers/installations/render/cesium/rendering.js

@@ -353,8 +353,9 @@ export function createRendering({
       )
       .map((record) => ({ lat: record.latitude, lon: record.longitude }));
     if (!cold.length) return;
+    const owner = layerState.dataSource;
     warmFireAnchorFloors(cold).then(() => {
-      if (!layerState.enabled || !layerState.dataSource) return;
+      if (!layerState.enabled || !owner || layerState.dataSource !== owner) return;
       if (
         !cold.some((point) => cachedGroundFloor(point.lat, point.lon) != null)
       )

src/layers/installations/render/navara.js

@@ -608,7 +608,7 @@ export function createInstallationsNavaraRenderer(
         services.picking.registerPickOwner(LAYER_ID, (id) =>
           layerState.recordById.has(id),
         );
-        renderRecords();
+        renderRecords({ claimSelection: Boolean(layerState.selectedId) });
       },
       disable() {
         visible = false;
@@ -640,6 +640,12 @@ export function createInstallationsNavaraRenderer(
       destroy() {
         source.destroy?.();
         this.disable();
+        this.detach();
+      },
+      detach() {
+        services.credits?.hideOsmCredit?.(engine, LAYER_ID);
+        syncPlacesCredit([]);
+        services.picking.unregisterPickOwner(LAYER_ID);
         layerState.moveEndRemove?.();
         layerState.changedRemove?.();
         layerState.moveEndRemove = layerState.changedRemove = null;

src/layers/installations/viewport.js

@@ -19,7 +19,9 @@ export function createViewport({ state: layerState, services, parts, source }) {
         return { box: bounds, coverage: { kind: 'subject', radiusM } };
       }
     }
-    return { box: viewportBox(viewer), coverage: { kind: 'viewport' } };
+    if (viewer || layerState.engine)
+      layerState.lastViewBox = viewportBox(viewer);
+    return { box: layerState.lastViewBox ?? null, coverage: { kind: 'viewport' } };
   }
 
   function viewportBox(viewer) {

src/layers/vessels/lifecycle.js

@@ -172,11 +172,11 @@ export function createLifecycle({
       components.rendering.installRuntime(scene);
       restoreSpriteOrder(viewer);
       components.rendering.setVisible(state.feed.enabled);
-      if (!state.feed.enabled) return;
-      bindVisibleScene(viewer, scene);
       const horizon = components.rendering.makeOccluder();
       for (const record of state.records.all)
         components.rendering.addRecordPrimitives(record, horizon);
+      if (!state.feed.enabled) return;
+      bindVisibleScene(viewer, scene);
       components.tracking.attachSelectedVesselTrail();
       components.rendering.updateVisibility(true);
       if (state.selectedRecord)

src/main.js

@@ -124,12 +124,19 @@ async function reconcile(remember = false) {
   const previous = kind;
   let cover;
   let cockpit;
+  const handoffHash = remember ? location.hash : null;
   try {
     while (pageEngineKind() !== kind) {
       cover ??= keepGlobeFrame(application.getComponents().scene.engine);
       cockpit = application
         .getComponents()
         .controls.styleManager.getCockpitState();
+      const manager = application.getComponents().data.dataManager;
+      layerSession.handoffLayers = location.hash === handoffHash
+        ? new Map([...manager.layers].map(([id, entry]) => [
+            id, { entry: entry.module.attachRenderer ? entry : null, enabled: manager.isEffectivelyEnabled(id) },
+          ]))
+        : null;
       renderers.retain(kind);
       await application.destroy();
       await start(pageEngineKind(), true, cockpit);
@@ -156,6 +163,7 @@ async function reconcile(remember = false) {
       report(recoveryError);
     }
   } finally {
+    layerSession.handoffLayers = null;
     cover?.remove();
     busy = false;
     present();

src/standalone/application.js

@@ -130,6 +130,7 @@ export function createStandaloneApplication({
       createStandaloneControls({
         ...context,
         engineSwitch,
+        layerSession,
         loaderStatus,
         placeSearch,
         catalog,

src/ui/applicationShell.js

@@ -105,11 +105,13 @@ export class StyleManager extends ShellFacade {
       requestServices,
       initialShareCode = null,
       engineSwitch = false,
+      layerSession = null,
       localePicker = true,
     } = {},
   ) {
     super();
     this._localePickerEnabled = localePicker;
+    this._layerSession = layerSession;
     const {
       IntelHUD,
       ShareLinkManager,
@@ -197,6 +199,7 @@ export class StyleManager extends ShellFacade {
     this._shareRestoration = new ShareRestoration({
       viewer,
       canvas: engine?.host.canvas ?? viewer?.canvas,
+      handoffLayers: layerSession?.handoffLayers,
       navigation: this._navigation,
       syncShareState: () => this._syncShareState(),
       syncModels3d: (state) => this._syncModels3dFromLayerState(state),
@@ -972,6 +975,8 @@ export class StyleManager extends ShellFacade {
         setClearBusy: (busy) => this._publishClearBusy(busy),
       },
     });
+    if (this._layerSession?.handoffLayers)
+      this._contextControls.resumeScene(this._layerSession.contacts);
     // The Contacts layer publishes its panel; the view calls its navigation.
     contextStore.connectAwareness(militaryAwarenessLayer);
     // A panel left by an earlier shell must not outlive its layer.
@@ -1855,7 +1860,13 @@ export class StyleManager extends ShellFacade {
     // Close camera-entry seams synchronously. Context restoration may await
     // layer work, so leaving these listeners attached until afterward lets a
     // focus event release tracking or start a flight during teardown.
+    if (this._layerSession && !this._layerSession.lifetime.signal.aborted &&
+        this._contextControls.canRetainContacts()) {
+      this._layerSession.contacts = this._contextControls.captureScene();
+    } else {
+      if (this._layerSession) this._layerSession.contacts = null;
       await this._contextControls.restoreForDisposal();
+    }
     // IR boost teardown BEFORE detaching the data manager: restore fog and
     // un-boost both aircraft layers so a surviving viewer or replacement
     // manager doesn't inherit sensor state (review P2, 2026-08-16).

src/ui/contextControls.js

@@ -85,6 +85,19 @@ export class ContextControls {
       this[field] = null;
     }
   }
+  canRetainContacts() {
+    return this._contextMode === 'flights' && !this._contextModeChanging &&
+      !this._contextRestoreState && !this._clearSelectedLayersPromise &&
+      !this._contextLayerReactionPromises.size;
+  }
+  captureScene() {
+    return { mode: this._contextMode, snapshot: this._contextSessionSnapshot };
+  }
+  resumeScene(saved) {
+    if (!saved) return;
+    this._contextMode = saved.mode;
+    this._contextSessionSnapshot = saved.snapshot;
+  }
   stop() {
     if (this.destroyed) return;
     this.destroyed = true;

src/ui/shareRestoration.js

@@ -110,6 +110,7 @@ export class ShareRestoration {
   constructor({
     viewer,
     canvas = viewer?.canvas,
+    handoffLayers = null,
     navigation,
     syncShareState,
     syncModels3d,
@@ -121,6 +122,7 @@ export class ShareRestoration {
     Object.assign(this, {
       viewer,
       canvas,
+      handoffLayers,
       navigation,
       syncShareState,
       syncModels3d,
@@ -368,11 +370,13 @@ export class ShareRestoration {
       );
       this._layerStateRestorePromise = this._layerStateCoordinator.start({
         shareLayerState: this._initialShareState?.layerState || null,
+        handoffLayers: this.handoffLayers,
         shareCreatedAtMs: this._initialShareState?.sharedAtMs ?? null,
         // Any valid camera/style share isolates recipient-local preferences,
         // including legacy and malformed-v2 layer payloads.
         allowLocalState: !this._initialShareState,
       });
+      this.handoffLayers = null;
       if (this._initialShareSelectionSuperseded) {
         this._layerStateCoordinator.cancelPendingShareTracking(
           'superseded-before-layer-coordinator-start',
@@ -425,6 +429,7 @@ export class ShareRestoration {
     try {
       while (live()) {
         const vessels = this._dataManager?.layers?.get?.(layerId)?.module;
+        if (vessels?.getSelectedInfo?.()?.mmsi === id) return true;
         if (vessels?.hasContact?.(id) && vessels.selectById(id)) return true;
         if (Date.now() >= deadline) break;
         await new Promise((resolve) =>