diff --git a/app/android/app/src/main/AndroidManifest.xml b/app/android/app/src/main/AndroidManifest.xml
index 74403a7..74be2b9 100644
--- a/app/android/app/src/main/AndroidManifest.xml
+++ b/app/android/app/src/main/AndroidManifest.xml
@@ -1,4 +1,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Fuer OSM-Kartenkacheln, Wind-/Terrain-APIs und die WiFi/TCP-Verbindung
+         zum Flightcontroller (Doku 4.1) auch im Release-Build noetig. -->
+    <uses-permission android:name="android.permission.INTERNET"/>
     <application
         android:label="dmc_app"
         android:name="${applicationName}"
@@ -8,6 +11,7 @@
             android:exported="true"
             android:launchMode="singleTop"
             android:taskAffinity=""
+            android:screenOrientation="sensorLandscape"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
diff --git a/app/lib/main.dart b/app/lib/main.dart
index fd1dc32..1c5c9a2 100644
--- a/app/lib/main.dart
+++ b/app/lib/main.dart
@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
@@ -9,7 +10,17 @@ import 'ui/dmc_colors.dart';
 import 'ui/screens/library/library_screen.dart';
 import 'ui/screens/settings/settings_screen.dart';
 
-void main() {
+Future<void> main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  // App laeuft ausschliesslich im Landscape-Vollbild (Prototyp-Referenz:
+  // Kartenansicht nutzt den gesamten Bildschirm ohne System-Chrome).
+  await SystemChrome.setPreferredOrientations([
+    DeviceOrientation.landscapeLeft,
+    DeviceOrientation.landscapeRight,
+  ]);
+  await SystemChrome.setEnabledSystemUIMode(SystemUiMode.immersiveSticky);
+
   runApp(const DmcApp());
 }
 
diff --git a/app/lib/ui/screens/plan/plan_screen.dart b/app/lib/ui/screens/plan/plan_screen.dart
index fd98865..31505a0 100644
--- a/app/lib/ui/screens/plan/plan_screen.dart
+++ b/app/lib/ui/screens/plan/plan_screen.dart
@@ -1,15 +1,18 @@
 import 'package:flutter/material.dart';
 
+import '../../widgets/mission_map.dart';
+
 /// Missionsplanung: Karte + Wegpunktliste (Architektur-Doku 3.6/3.7).
-/// Kartenintegration (flutter_map) und Fillet-Geometrie folgen als naechster
-/// Schritt - dies ist bewusst nur der Screen-Platzhalter.
+/// Top-/Bottom-Bar-Overlays (Modus-Umschalter, Draeder, Wegpunktliste) folgen
+/// als naechster Schritt - dies ist bewusst erst die Vollbild-Karte.
 class PlanScreen extends StatelessWidget {
   const PlanScreen({super.key});
 
   @override
   Widget build(BuildContext context) {
     return const Scaffold(
-      body: Center(child: Text('Plan')),
+      extendBodyBehindAppBar: true,
+      body: MissionMap(),
     );
   }
 }
diff --git a/app/lib/ui/widgets/mission_map.dart b/app/lib/ui/widgets/mission_map.dart
new file mode 100644
index 0000000..654f8ec
--- /dev/null
+++ b/app/lib/ui/widgets/mission_map.dart
@@ -0,0 +1,43 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_map/flutter_map.dart';
+import 'package:latlong2/latlong.dart';
+import 'package:url_launcher/url_launcher.dart';
+
+/// Vollbild-OSM-Karte, entspricht dem Leaflet-`#map` im HTML-Demonstrator:
+/// randlos, ohne Zoom-Buttons (Pinch-to-Zoom/Pan reicht), Standard-OSM-Tiles.
+class MissionMap extends StatelessWidget {
+  const MissionMap({super.key, this.mapController});
+
+  final MapController? mapController;
+
+  // Default-Zentrum/Zoom uebernommen aus dem HTML-Demonstrator
+  // (Drone Mission Control.html: L.map(...).setView([52.3676, 4.9041], 16)).
+  static const _initialCenter = LatLng(52.3676, 4.9041);
+  static const _initialZoom = 16.0;
+
+  @override
+  Widget build(BuildContext context) {
+    return FlutterMap(
+      mapController: mapController,
+      options: const MapOptions(
+        initialCenter: _initialCenter,
+        initialZoom: _initialZoom,
+        minZoom: 3,
+        maxZoom: 19,
+      ),
+      children: [
+        TileLayer(
+          urlTemplate: 'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
+          userAgentPackageName: 'de.dmc.dmc_app',
+          maxZoom: 19,
+        ),
+        SimpleAttributionWidget(
+          alignment: Alignment.bottomLeft,
+          source: const Text('OpenStreetMap contributors'),
+          onTap: () =>
+              launchUrl(Uri.parse('https://www.openstreetmap.org/copyright')),
+        ),
+      ],
+    );
+  }
+}
diff --git a/app/pubspec.lock b/app/pubspec.lock
index c58ee62..a040fca 100644
--- a/app/pubspec.lock
+++ b/app/pubspec.lock
@@ -917,6 +917,70 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.9"
+  url_launcher:
+    dependency: "direct main"
+    description:
+      name: url_launcher
+      sha256: f6a7e5c4835bb4e3026a04793a4199ca2d14c739ec378fdfe23fc8075d0439f8
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.2"
+  url_launcher_android:
+    dependency: transitive
+    description:
+      name: url_launcher_android
+      sha256: b413d49b73867ac08dd2f9890efd3cc11f2a0e577618d50843440a1fb3776c32
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.32"
+  url_launcher_ios:
+    dependency: transitive
+    description:
+      name: url_launcher_ios
+      sha256: "580fe5dfb51671ae38191d316e027f6b76272b026370708c2d898799750a02b0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.4.1"
+  url_launcher_linux:
+    dependency: transitive
+    description:
+      name: url_launcher_linux
+      sha256: d5e14138b3bc193a0f63c10a53c94b91d399df0512b1f29b94a043db7482384a
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.2"
+  url_launcher_macos:
+    dependency: transitive
+    description:
+      name: url_launcher_macos
+      sha256: "368adf46f71ad3c21b8f06614adb38346f193f3a59ba8fe9a2fd74133070ba18"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.5"
+  url_launcher_platform_interface:
+    dependency: transitive
+    description:
+      name: url_launcher_platform_interface
+      sha256: "552f8a1e663569be95a8190206a38187b531910283c3e982193e4f2733f01029"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.2"
+  url_launcher_web:
+    dependency: transitive
+    description:
+      name: url_launcher_web
+      sha256: "85c81589622fbc87c1c683aaea164d3604a7777495a79d91e39ffcdec39ddb34"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.3"
+  url_launcher_windows:
+    dependency: transitive
+    description:
+      name: url_launcher_windows
+      sha256: "712c70ab1b99744ff066053cbe3e80c73332b38d46e5e945c98689b2e66fc15f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.5"
   uuid:
     dependency: transitive
     description:
@@ -1015,4 +1079,4 @@ packages:
     version: "3.1.3"
 sdks:
   dart: ">=3.12.2 <4.0.0"
-  flutter: ">=3.38.4"
+  flutter: ">=3.44.0"
diff --git a/app/pubspec.yaml b/app/pubspec.yaml
index 2ba1f4e..4da2e70 100644
--- a/app/pubspec.yaml
+++ b/app/pubspec.yaml
@@ -50,6 +50,7 @@ dependencies:
   flutter_bloc: ^9.1.1
   flutter_riverpod: ^3.4.1
   go_router: ^17.3.0
+  url_launcher: ^6.3.2
 
 dev_dependencies:
   flutter_test:
diff --git a/app/test/widget_test.dart b/app/test/widget_test.dart
index ca17604..72af05e 100644
--- a/app/test/widget_test.dart
+++ b/app/test/widget_test.dart
@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_map/flutter_map.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:flutter_test/flutter_test.dart';
 
@@ -7,7 +8,7 @@ import 'package:dmc_app/app_mode/app_mode_cubit.dart';
 import 'package:dmc_app/ui/app_shell.dart';
 
 void main() {
-  testWidgets('AppShell zeigt Plan-Screen im Startzustand', (tester) async {
+  testWidgets('AppShell zeigt die Karte im Plan-Startzustand', (tester) async {
     await tester.pumpWidget(
       ProviderScope(
         child: BlocProvider(
@@ -16,7 +17,10 @@ void main() {
         ),
       ),
     );
+    // Nur ein Frame pumpen statt pumpAndSettle: TileLayer laedt echte
+    // Netzwerk-Kacheln, die in der Testumgebung nie ankommen.
+    await tester.pump();
 
-    expect(find.text('Plan'), findsOneWidget);
+    expect(find.byType(FlutterMap), findsOneWidget);
   });
 }