- Category: Water Feature
- Type: Island
- Latitude/Longitude: 55°59'15"N 3°10'19"W
- Eastings/Northings: 326978, 677797
- OS Grid: NT269777
- Mapcode Local: GBR 8S1.Z3
- Mapcode Global: WH6SF.7RRP
Location and coordinates are for the approximate centre of Martello Rocks within this administrative area.
Geographic features and populated places may cross administrative borders.