diff --git a/src/cockpitMarkup.test.mjs b/src/cockpitMarkup.test.mjs
index 3f461c392..791fdbdb2 100644
--- a/src/cockpitMarkup.test.mjs
+++ b/src/cockpitMarkup.test.mjs
@@ -26,10 +26,7 @@ import {
   setSignalCollapsed,
 } from './ui/cockpitLayout.js';
 import { createBriefState } from './ui/cockpitBriefPages.js';
-import {
-  publishBriefView,
-  setBriefAutoRotate,
-} from './ui/cockpitBriefing.js';
+import { publishBriefView, setBriefAutoRotate } from './ui/cockpitBriefing.js';
 import { CockpitDisplayPortal } from './ui/cockpitDisplayPortal.js';
 import { _handleContextLayerChange } from './ui/contextLayerChanges.js';
 import { clearSelectedLayers } from './ui/contextActions.js';
@@ -438,13 +435,10 @@ test('Cockpit owns a focused shared Display portal and compact Radio controls',
     /data-cockpit-launcher="radio"[\s\S]*?id="cockpit-radio-toggle-btn"/,
   );
   const cockpitRadio = html.match(
-    /id="cockpit-radio-panel"[\s\S]*?<\/div>\s*<\/div>\s*<\/aside>/,
+    /id="cockpit-radio-panel"[\s\S]*?<\/div>\s*<\/div>\s*<div class="cockpit-utility-rail/,
   );
   assert.ok(cockpitRadio, 'Cockpit compact Radio controls are missing');
-  assert.doesNotMatch(
-    cockpitRadio[0],
-    /radio-filter|radio-tuner/,
-  );
+  assert.doesNotMatch(cockpitRadio[0], /radio-filter|radio-tuner/);
   assert.match(
     css,
     /\.cockpit-utility-controls[\s\S]*?top:\s*var\(\s*--cockpit-utility-top/,
@@ -811,18 +805,27 @@ test('Reset releases Contact camera ownership through its selection-preserving r
   );
   assert.match(ui, /onReset: \(\) => this\.resetToGlobeView\(\)/);
   assert.match(ui, /this\._connectGlobeReset\?\.\(this\._locationControls\)/);
-  assert.match(controls, /reset\(\) \{\s*if \(!this\.destroyed\) return this\.onReset\(\);/);
+  assert.match(
+    controls,
+    /reset\(\) \{\s*if \(!this\.destroyed\) return this\.onReset\(\);/,
+  );
   // Both reset buttons ask the one reset owner.
   const globeActions = fs.readFileSync(
     path.join(ROOT, 'src', 'ui', 'views', 'panels', 'GlobeActions.vue'),
     'utf8',
   );
-  assert.match(globeActions, /id="reset-globe-view"[^>]*@click="act\('reset'\)"/);
+  assert.match(
+    globeActions,
+    /id="reset-globe-view"[^>]*@click="act\('reset'\)"/,
+  );
   const cockpitView = readRadioSource(
     new URL('./ui/views/CockpitView.vue', import.meta.url),
     'utf8',
   );
-  assert.match(cockpitView, /id="cockpit-reset-globe"[^>]*@click="globe\.act\('reset'\)"/);
+  assert.match(
+    cockpitView,
+    /id="cockpit-reset-globe"[^>]*@click="globe\.act\('reset'\)"/,
+  );
   assert.match(
     cockpitEnter.toString(),
     /Object\.assign\(this\.presence, \{\s*active: true,/,
@@ -1193,7 +1196,10 @@ test('cockpit summary presents the focused item as Contact', () => {
   const match = html.match(/<aside id="cockpit-context"[\s\S]*?<\/aside>/);
   assert.ok(match, 'cockpit Contact summary is missing');
   assert.match(match[0], /aria-label="Contact cockpit summary"/);
-  assert.match(match[0], /class="cockpit-card-kicker cockpit-context-kicker">CONTACT</);
+  assert.match(
+    match[0],
+    /class="cockpit-card-kicker cockpit-context-kicker">CONTACT</,
+  );
   assert.match(match[0], /aria-label="Contact navigation"/);
   assert.match(
     match[0],
@@ -1408,15 +1414,30 @@ test('Contact folded for one Cockpit left panel comes back only once neither is
   const previous = globalThis.document;
   const panels = {};
   globalThis.document = { getElementById: (id) => panels[id] ?? null };
-  const panel = (...classes) => ({ classList: { contains: (name) => classes.includes(name) } });
+  const panel = (...classes) => ({
+    classList: { contains: (name) => classes.includes(name) },
+  });
   try {
-    const otherOpen = (id) => PanelChrome.prototype._otherCockpitLeftPanelOpen(id);
+    const otherOpen = (id) =>
+      PanelChrome.prototype._otherCockpitLeftPanelOpen(id);
     panels['data-panel'] = panel('collapsed');
-    assert.equal(otherOpen('utilities-panel'), false, 'Data Layers closed: restore');
+    assert.equal(
+      otherOpen('utilities-panel'),
+      false,
+      'Data Layers closed: restore',
+    );
     panels['data-panel'] = panel('collapsed', 'layout-auto-collapsed');
-    assert.equal(otherOpen('utilities-panel'), true, 'Data Layers comes back: keep Contact folded');
+    assert.equal(
+      otherOpen('utilities-panel'),
+      true,
+      'Data Layers comes back: keep Contact folded',
+    );
     panels['data-panel'] = panel();
-    assert.equal(otherOpen('utilities-panel'), true, 'Data Layers open: keep it folded');
+    assert.equal(
+      otherOpen('utilities-panel'),
+      true,
+      'Data Layers open: keep it folded',
+    );
   } finally {
     globalThis.document = previous;
   }
diff --git a/src/ui/cockpitUtilityControls.test.mjs b/src/ui/cockpitUtilityControls.test.mjs
index 8ae377b5f..1d790db1a 100644
--- a/src/ui/cockpitUtilityControls.test.mjs
+++ b/src/ui/cockpitUtilityControls.test.mjs
@@ -450,3 +450,42 @@ test('the real layout pass drives the mounted controls: compact hides the collap
   assert.equal(cockpit.utilityLayout.top, '120.00px');
   assert.equal(strip.classList.contains('layout-primary-only'), false);
 });
+
+test('the rail opens one panel at a time and reads as a disclosure', async (t) => {
+  const { $, controls } = fixture(t);
+  const item = (kind) =>
+    document.querySelector(`[data-cockpit-rail-item="${kind}"]`);
+  item('display').click();
+  await nextTick();
+  assert.equal($('cockpit-display-panel').hidden, false);
+  assert.equal(item('display').getAttribute('aria-expanded'), 'true');
+  assert.equal(
+    item('display').getAttribute('aria-controls'),
+    'cockpit-display-panel',
+  );
+  item('radio').click();
+  await nextTick();
+  assert.equal($('cockpit-display-panel').hidden, true);
+  assert.equal($('cockpit-radio-panel').hidden, false);
+  assert.equal(item('display').getAttribute('aria-expanded'), 'false');
+  assert.equal(item('radio').getAttribute('aria-expanded'), 'true');
+  item('radio').click();
+  await nextTick();
+  assert.equal(controls._cockpitDisclosureOpen('radio'), false);
+  assert.equal(controls._cockpitDisclosureOpen('display'), false);
+});
+
+test('collapsing an open panel hands focus to the rail when its toggle is hidden', async (t) => {
+  const { $, controls } = fixture(t);
+  const railItem = document.querySelector('[data-cockpit-rail-item="radio"]');
+  // happy-dom lays nothing out: show the rail and hide the launcher's toggle
+  // as the desktop look does.
+  railItem.getClientRects = () => [{ width: 32, height: 32 }];
+  $('cockpit-radio-toggle-btn').getClientRects = () => [];
+  controls._setCockpitDisclosure('radio', true);
+  await nextTick();
+  document.querySelector('.cockpit-utility-collapse').click();
+  await nextTick();
+  assert.equal($('cockpit-radio-panel').hidden, true);
+  assert.equal(document.activeElement, railItem);
+});
diff --git a/src/ui/radioBindings.js b/src/ui/radioBindings.js
index 82709c2ca..906faab20 100644
--- a/src/ui/radioBindings.js
+++ b/src/ui/radioBindings.js
@@ -27,10 +27,18 @@ export function bindRadioControls() {
     this.store?.publishUtility({ ...this._cockpitDisclosure });
     if (displayOpen) this.actions.revealStyleParameters();
     if (!expanded && returnFocus) {
-      (kind === 'display'
-        ? this._cockpitDisplayToggleBtn
-        : this._cockpitRadioToggleBtn
-      )?.focus({ preventScroll: true });
+      // The desktop cockpit hides the launchers' toggles behind its rail, so
+      // focus goes to whichever of the two is shown.
+      const toggle =
+        kind === 'display'
+          ? this._cockpitDisplayToggleBtn
+          : this._cockpitRadioToggleBtn;
+      const railItem = toggle?.ownerDocument?.querySelector?.(
+        `[data-cockpit-rail-item="${kind}"]`,
+      );
+      (toggle?.getClientRects?.().length ? toggle : railItem || toggle)?.focus({
+        preventScroll: true,
+      });
     }
     if (
       !displayOpen &&
@@ -444,6 +452,16 @@ export function bindRadioControls() {
       ),
     toggleCockpitRadio: () =>
       setCockpitDisclosure('radio', !this._cockpitDisclosureOpen('radio')),
+    /**
+     * Open or close the cockpit's Display or Radio panel; opening one closes
+     * the other.
+     * @param {'display'|'radio'} kind
+     * @param {{ returnFocus?: boolean }} [options]
+     */
+    toggleCockpitUtility: (kind, { returnFocus = false } = {}) => {
+      const open = !this._cockpitDisclosureOpen(kind);
+      setCockpitDisclosure(kind, open, { returnFocus: !open && returnFocus });
+    },
     /**
      * @param {string} filter
      * @returns {string} The station tag the filter shows afterwards.
diff --git a/src/ui/views/panels/CockpitUtilityControls.vue b/src/ui/views/panels/CockpitUtilityControls.vue
index e2e85cf3c..956fb2f63 100644
--- a/src/ui/views/panels/CockpitUtilityControls.vue
+++ b/src/ui/views/panels/CockpitUtilityControls.vue
@@ -8,25 +8,13 @@ import { useRadioStore } from '../../stores/radio.js';
 import { useCockpitStore } from '../../stores/cockpit.js';
 import { useDisplayStore } from '../../stores/display.js';
 import UiButton from '../../kit/UiButton.vue';
-import UiPanelEdge from '../../kit/UiPanelEdge.vue';
 
-// The open panel's header carries the same edge switch and collapse button as
-// the main panels; collapsing goes through each launcher's own toggle.
-function collapse(which) {
-  if (which === 'radio') act('toggleCockpitRadio');
-  else document.getElementById('cockpit-display-toggle-btn')?.click();
-}
-// The rail opens one panel at a time, as the main page's rails do.
-function railToggle(which) {
-  const other = which === 'radio' ? 'display' : 'radio';
-  if (open.value[other]) collapse(other);
-  collapse(which);
-}
-
-// The Cockpit's Display and Radio launchers and their popovers. RadioControls
-// presents which popover is open and the compact Radio controls; until it
-// does, both are closed and the controls show their initial state. The
-// controls call RadioControls through the store. The Display popover's slots
+// The Cockpit's Display and Radio launchers and their popovers, and the
+// desktop look's rail, whose icons stay at the edge and open one panel at a
+// time as the main page's rails do. RadioControls presents which popover is
+// open and the compact Radio controls; until it does, both are closed and the
+// controls show their initial state. The controls call RadioControls through
+// the store. The Display popover's slots
 // are static: the Display panel teleports its real controls into them while
 // the Cockpit display portal publishes them.
 const store = useRadioStore();
@@ -66,8 +54,7 @@ const radioLabel = computed(() =>
       <div class="cockpit-utility-launcher" data-cockpit-launcher="display">
         <span>{{ t('DISPLAY') }}</span>
         <span class="cockpit-utility-divider" aria-hidden="true"></span>
-        <UiPanelEdge v-if="open.display" />
-        <button v-if="open.display" type="button" class="cockpit-utility-collapse" :aria-label="t('Collapse panel')" :title="t('Collapse panel')" @click="collapse('display')">−</button>
+        <button v-if="open.display" type="button" class="cockpit-utility-collapse" :aria-label="t('Collapse panel')" :title="t('Collapse panel')" @click="act('toggleCockpitUtility', 'display', { returnFocus: true })">−</button>
         <button id="cockpit-display-toggle-btn" class="cockpit-utility-glyph" type="button" :aria-expanded="String(open.display)" aria-controls="cockpit-display-panel" :aria-label="displayLabel" :title="displayLabel">{{ open.display ? '▶' : '◀' }}</button>
       </div>
       <div id="cockpit-display-panel" class="cockpit-utility-popover ui-scroll" v-class-toggle="{ 'uses-shared-display-controls': !!cockpitPortal }" role="group" :aria-label="t('Cockpit display options')" :hidden="!open.display">
@@ -81,8 +68,7 @@ const radioLabel = computed(() =>
       <div class="cockpit-utility-launcher" data-cockpit-launcher="radio">
         <span>{{ t('RADIO') }}</span>
         <span class="cockpit-utility-divider" aria-hidden="true"></span>
-        <UiPanelEdge v-if="open.radio" />
-        <button v-if="open.radio" type="button" class="cockpit-utility-collapse" :aria-label="t('Collapse panel')" :title="t('Collapse panel')" @click="collapse('radio')">−</button>
+        <button v-if="open.radio" type="button" class="cockpit-utility-collapse" :aria-label="t('Collapse panel')" :title="t('Collapse panel')" @click="act('toggleCockpitUtility', 'radio', { returnFocus: true })">−</button>
         <button id="cockpit-radio-toggle-btn" @click="act('toggleCockpitRadio')" class="cockpit-utility-glyph" type="button" :aria-expanded="String(open.radio)" aria-controls="cockpit-radio-panel" :aria-label="radioLabel" :title="radioLabel">{{ open.radio ? '▶' : '◀' }}</button>
       </div>
       <div id="cockpit-radio-panel" class="cockpit-utility-popover cockpit-radio-compact" role="group" :aria-label="t('Cockpit compact Radio controls')" :hidden="!open.radio">
@@ -100,15 +86,15 @@ const radioLabel = computed(() =>
         </label>
       </div>
     </div>
-    <nav class="cockpit-utility-rail" :class="{ 'is-open': open.display || open.radio }" :aria-label="t('Cockpit display and Radio controls')">
+    <div class="cockpit-utility-rail" :class="{ 'is-open': open.display || open.radio }">
       <span class="cockpit-utility-rail__labels" aria-hidden="true">
         <span>{{ t('DISPLAY') }}</span>
         <span>{{ t('RADIO') }}</span>
       </span>
       <span class="cockpit-utility-rail__icons">
-        <button type="button" class="cockpit-utility-rail__item" :class="{ 'is-on': open.display }" :aria-pressed="String(open.display)" :aria-label="displayLabel" :title="displayLabel" @click="railToggle('display')"><span class="material-symbols-outlined" aria-hidden="true">tune</span></button>
-        <button type="button" class="cockpit-utility-rail__item" :class="{ 'is-on': open.radio }" :aria-pressed="String(open.radio)" :aria-label="radioLabel" :title="radioLabel" @click="railToggle('radio')"><span class="material-symbols-outlined" aria-hidden="true">radio</span></button>
+        <button type="button" class="cockpit-utility-rail__item" data-cockpit-rail-item="display" :class="{ 'is-on': open.display }" :aria-expanded="String(open.display)" aria-controls="cockpit-display-panel" :aria-label="displayLabel" :title="displayLabel" @click="act('toggleCockpitUtility', 'display')"><span class="material-symbols-outlined" aria-hidden="true">tune</span></button>
+        <button type="button" class="cockpit-utility-rail__item" data-cockpit-rail-item="radio" :class="{ 'is-on': open.radio }" :aria-expanded="String(open.radio)" aria-controls="cockpit-radio-panel" :aria-label="radioLabel" :title="radioLabel" @click="act('toggleCockpitUtility', 'radio')"><span class="material-symbols-outlined" aria-hidden="true">radio</span></button>
       </span>
-    </nav>
+    </div>
   </aside>
 </template>