- Category: Water Feature
- Type: Island
- Latitude/Longitude: 49°57'41"N 6°17'48"W
- Eastings/Northings: 91951, 15681
- OS Grid: SV919156
- Mapcode Local: GBR BXVS.DJG
- Mapcode Global: VGYBY.S7Z8
Location and coordinates are for the approximate centre of Jack's Ledge within this administrative area.
Geographic features and populated places may cross administrative borders.