- Category: Water Feature
- Type: Island
- Latitude/Longitude: 49°57'38"N 6°17'54"W
- Eastings/Northings: 91823, 15568
- OS Grid: SV918155
- Mapcode Local: GBR BXTS.KSL
- Mapcode Global: VGYBY.S821
Location and coordinates are for the approximate centre of Round Rock Ledge within this administrative area.
Geographic features and populated places may cross administrative borders.