diff --git a/app/components/live-atc/cockpit/CockpitShell.vue b/app/components/live-atc/cockpit/CockpitShell.vue
index 430c112..5b6114c 100644
--- a/app/components/live-atc/cockpit/CockpitShell.vue
+++ b/app/components/live-atc/cockpit/CockpitShell.vue
@@ -910,8 +910,20 @@ onMounted(() => {
   }
 }
 @media (max-width: 720px) {
+  /* The callsign stays put at every width — the pilot needs it on every
+     transmission, and the HUD is the one element that is always on screen.
+     Shrink it here rather than hiding the group. */
   .hud-context-group {
-    display: none;
+    margin-left: 0;
+    flex: 0 1 auto;
+    min-width: 0;
+  }
+  .hud-context-btn {
+    min-width: 0;
+    padding: 4px 8px;
+  }
+  .hud-context-callsign {
+    max-width: 104px;
   }
 }
 @media (max-width: 860px) {
diff --git a/app/plugins/mock-live-atc.client.ts b/app/plugins/mock-live-atc.client.ts
index d4a4329..626665c 100644
--- a/app/plugins/mock-live-atc.client.ts
+++ b/app/plugins/mock-live-atc.client.ts
@@ -44,6 +44,28 @@ export default defineNuxtPlugin(() => {
 
   const METAR = 'EDDF 101950Z 25008KT 9999 FEW040 18/12 Q1013 NOSIG'
 
+  // Matches FREQS above: one ATIS station on 118.025 broadcasting information K.
+  const ATIS = {
+    icao: 'EDDF',
+    source: 'vatsim',
+    letter: 'K',
+    letterDep: 'K',
+    letterArr: 'K',
+    runwayDep: '25C',
+    runwayArr: '25L',
+    runwaySource: 'atis',
+    qnhHpa: 1013,
+    surfaceWind: '250/08',
+    observedAt: null,
+    stations: [{
+      frequency: '118.025',
+      callsign: 'EDDF_ATIS',
+      variant: null,
+      letter: 'K',
+      text: 'FRANKFURT INFORMATION K, DEP RWY 25C, EXPECT ILS APPROACH RUNWAY 25L, QNH 1013',
+    }],
+  }
+
   const json = (data: unknown) => data
 
   // Return a canned response for a mocked Nuxt path, or the sentinel MISS.
@@ -56,6 +78,7 @@ export default defineNuxtPlugin(() => {
     if (path === '/api/auth/login') return json({ accessToken: 'mock-token', user: MOCK_USER })
 
     if (/^\/api\/airports\/[^/]+\/frequencies$/.test(path)) return json(FREQS)
+    if (/^\/api\/airports\/[^/]+\/atis$/.test(path)) return json(ATIS)
     if (path === '/api/vatsim/metar') return METAR
     if (path === '/api/vatsim/flightplans') return json({ flightplans: [] })
 
@@ -67,7 +90,9 @@ export default defineNuxtPlugin(() => {
     // a PTT press behaves as a correct readback against the real backend.
     if (path === '/api/atc/ptt') {
       const expected = opts?.body?.expected
-      const transcription = (Array.isArray(expected) ? expected[0] : expected) || 'say again'
+      // The fallback must not be standard phraseology: "say again" is
+      // intercepted by the backend and repeats the transmission instead.
+      const transcription = (Array.isArray(expected) ? expected[0] : expected) || 'unreadable'
       return json({ success: true, transcription })
     }