- Category: Water Feature
- Type: Island
- Latitude/Longitude: 49°57'32"N 6°15'41"W
- Eastings/Northings: 94456, 15247
- OS Grid: SV944152
- Mapcode Local: GBR BXXS.QMV
- Mapcode Global: VGYBZ.F928
Location and coordinates are for the approximate centre of Great Carn within this administrative area.
Geographic features and populated places may cross administrative borders.