diff --git a/app/decoder.py b/app/decoder.py
index d2a83fbc..e0352ae9 100644
--- a/app/decoder.py
+++ b/app/decoder.py
@@ -85,6 +85,10 @@ class PacketInfo:
     path_hash_size: int = 1  # Bytes per hop: 1, 2, or 3
 
 
+def _is_valid_advert_location(lat: float, lon: float) -> bool:
+    return -90 <= lat <= 90 and -180 <= lon <= 180
+
+
 def extract_payload(raw_packet: bytes) -> bytes | None:
     """
     Extract just the payload from a raw packet, skipping header and path.
@@ -243,7 +247,9 @@ def get_packet_payload_type(raw_packet: bytes) -> PayloadType | None:
         return None
 
 
-def parse_advertisement(payload: bytes) -> ParsedAdvertisement | None:
+def parse_advertisement(
+    payload: bytes, raw_packet: bytes | None = None
+) -> ParsedAdvertisement | None:
     """
     Parse an advertisement payload.
 
@@ -299,6 +305,16 @@ def parse_advertisement(payload: bytes) -> ParsedAdvertisement | None:
         lon_raw = int.from_bytes(payload[offset + 4 : offset + 8], byteorder="little", signed=True)
         lat = lat_raw / 1_000_000
         lon = lon_raw / 1_000_000
+        if not _is_valid_advert_location(lat, lon):
+            packet_hex = (raw_packet if raw_packet is not None else payload).hex().upper()
+            logger.warning(
+                "Dropping location data for nonsensical packet -- packet %s implies lat/lon %s/%s. Outta this world!",
+                packet_hex,
+                lat,
+                lon,
+            )
+            lat = None
+            lon = None
         offset += 8
 
     # Skip feature fields if present
diff --git a/app/packet_processor.py b/app/packet_processor.py
index afeb41b4..2a398503 100644
--- a/app/packet_processor.py
+++ b/app/packet_processor.py
@@ -425,7 +425,7 @@ async def _process_advertisement(
         logger.debug("Failed to parse advertisement packet")
         return
 
-    advert = parse_advertisement(packet_info.payload)
+    advert = parse_advertisement(packet_info.payload, raw_packet=raw_bytes)
     if not advert:
         logger.debug("Failed to parse advertisement payload")
         return
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diff --git a/frontend/prebuilt/index.html b/frontend/prebuilt/index.html
index 5145914f..8cf690dc 100644
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diff --git a/frontend/src/components/RepeaterDashboard.tsx b/frontend/src/components/RepeaterDashboard.tsx
index ef3b4347..46c0a225 100644
--- a/frontend/src/components/RepeaterDashboard.tsx
+++ b/frontend/src/components/RepeaterDashboard.tsx
@@ -225,7 +225,7 @@ export function RepeaterDashboard({
         ) : (
           <div className="space-y-4">
             {/* Top row: Telemetry + Radio Settings | Node Info + Neighbors */}
-            <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
+            <div className="grid grid-cols-1 gap-4 md:grid-cols-2 md:items-stretch">
               <div className="flex flex-col gap-4">
                 <NodeInfoPane
                   data={paneData.nodeInfo}
@@ -255,7 +255,7 @@ export function RepeaterDashboard({
                   disabled={anyLoading}
                 />
               </div>
-              <div className="flex flex-col gap-4">
+              <div className="flex min-h-0 flex-col gap-4">
                 <NeighborsPane
                   data={paneData.neighbors}
                   state={paneStates.neighbors}
diff --git a/frontend/src/components/repeater/RepeaterNeighborsPane.tsx b/frontend/src/components/repeater/RepeaterNeighborsPane.tsx
index 000e6901..6812f90e 100644
--- a/frontend/src/components/repeater/RepeaterNeighborsPane.tsx
+++ b/frontend/src/components/repeater/RepeaterNeighborsPane.tsx
@@ -99,16 +99,16 @@ export function NeighborsPane({
       state={state}
       onRefresh={onRefresh}
       disabled={disabled}
-      className="flex flex-col"
-      contentClassName="flex-1 flex flex-col"
+      className="flex min-h-0 flex-1 flex-col"
+      contentClassName="flex min-h-0 flex-1 flex-col"
     >
       {!data ? (
         <NotFetched />
       ) : sorted.length === 0 ? (
         <p className="text-sm text-muted-foreground">No neighbors reported</p>
       ) : (
-        <div className="flex-1 flex flex-col gap-2">
-          <div className="overflow-x-auto">
+        <div className="flex min-h-0 flex-1 flex-col gap-2">
+          <div className="shrink-0 overflow-x-auto">
             <table className="w-full text-sm">
               <thead>
                 <tr className="text-left text-muted-foreground text-xs">
@@ -145,7 +145,7 @@ export function NeighborsPane({
           {hasValidRepeaterGps && (neighborsWithCoords.length > 0 || hasValidRepeaterGps) ? (
             <Suspense
               fallback={
-                <div className="h-48 flex items-center justify-center text-xs text-muted-foreground">
+                <div className="flex min-h-48 flex-1 items-center justify-center text-xs text-muted-foreground">
                   Loading map...
                 </div>
               }
diff --git a/frontend/src/test/pathUtils.test.ts b/frontend/src/test/pathUtils.test.ts
index 0b7f29e8..79dfdc49 100644
--- a/frontend/src/test/pathUtils.test.ts
+++ b/frontend/src/test/pathUtils.test.ts
@@ -7,6 +7,7 @@ import {
   formatRouteLabel,
   formatRoutingOverrideInput,
   getEffectiveContactRoute,
+  isValidLocation,
   resolvePath,
   formatDistance,
   formatHopCounts,
@@ -665,6 +666,24 @@ describe('resolvePath', () => {
   });
 });
 
+describe('isValidLocation', () => {
+  it('rejects null and unset coordinates', () => {
+    expect(isValidLocation(null, -122.3)).toBe(false);
+    expect(isValidLocation(47.6, null)).toBe(false);
+    expect(isValidLocation(0, 0)).toBe(false);
+  });
+
+  it('rejects out-of-range coordinates', () => {
+    expect(isValidLocation(-593.497573, -1659.939204)).toBe(false);
+    expect(isValidLocation(91, 0)).toBe(false);
+    expect(isValidLocation(0, 181)).toBe(false);
+  });
+
+  it('accepts sane coordinates', () => {
+    expect(isValidLocation(47.6062, -122.3321)).toBe(true);
+  });
+});
+
 describe('formatDistance', () => {
   it('formats distances under 1km in meters', () => {
     expect(formatDistance(0.5)).toBe('500m');
diff --git a/frontend/src/utils/pathUtils.ts b/frontend/src/utils/pathUtils.ts
index 5d84f266..e0412526 100644
--- a/frontend/src/utils/pathUtils.ts
+++ b/frontend/src/utils/pathUtils.ts
@@ -273,6 +273,9 @@ export function isValidLocation(lat: number | null, lon: number | null): boolean
   if (lat === null || lon === null) {
     return false;
   }
+  if (lat < -90 || lat > 90 || lon < -180 || lon > 180) {
+    return false;
+  }
   // (0, 0) is in the Atlantic Ocean - treat as unset
   if (lat === 0 && lon === 0) {
     return false;
diff --git a/tests/test_decoder.py b/tests/test_decoder.py
index a357a0b9..5d67ae34 100644
--- a/tests/test_decoder.py
+++ b/tests/test_decoder.py
@@ -448,6 +448,38 @@ class TestAdvertisementParsing:
         assert result.lat is None
         assert result.lon is None
 
+    def test_parse_advertisement_discards_out_of_range_gps(self, caplog):
+        """Out-of-range advert coordinates are treated as missing."""
+        from app.decoder import parse_advertisement
+
+        payload = bytearray()
+        payload.extend(
+            bytes.fromhex("f29fdc7c560f9d813d1593a8587fa46a9e7efe2f5506d38c0af41307bf9e517a")
+        )
+        payload.extend((1718749967).to_bytes(4, byteorder="little"))
+        payload.extend(bytes(64))
+        payload.append(0x92)
+        payload.extend((-593497573).to_bytes(4, byteorder="little", signed=True))
+        payload.extend((-1659939204).to_bytes(4, byteorder="little", signed=True))
+        payload.extend(b"Tacompton")
+        raw_packet = bytes.fromhex("11") + bytes(payload)
+
+        with caplog.at_level("WARNING"):
+            result = parse_advertisement(bytes(payload), raw_packet=raw_packet)
+
+        assert result is not None
+        assert (
+            result.public_key == "f29fdc7c560f9d813d1593a8587fa46a9e7efe2f5506d38c0af41307bf9e517a"
+        )
+        assert result.name == "Tacompton"
+        assert result.device_role == 2
+        assert result.lat is None
+        assert result.lon is None
+        assert "Dropping location data for nonsensical packet -- packet" in caplog.text
+        assert raw_packet.hex().upper() in caplog.text
+        assert "-593.497573/-1659.939204" in caplog.text
+        assert "Outta this world!" in caplog.text
+
     def test_parse_advertisement_extracts_public_key(self):
         """Advertisement parsing extracts the public key correctly."""
         from app.decoder import parse_advertisement, parse_packet