- Category: Water Feature
- Type: Island
- Latitude/Longitude: 51°53'8"N 5°20'2"W
- Eastings/Northings: 170655, 226052
- OS Grid: SM706260
- Mapcode Local: GBR C2.RCLL
- Mapcode Global: VH0TC.HVGS
Location and coordinates are for the approximate centre of Gwahan within this administrative area.
Geographic features and populated places may cross administrative borders.