- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 49°57'59"N 6°17'15"W
- Eastings/Northings: 92649, 16179
- OS Grid: SV926161
- Mapcode Local: GBR BXVR.YM8
- Mapcode Global: VGYBY.Y3WJ
Location and coordinates are for the approximate centre of Great Bay within this administrative area.
Geographic features and populated places may cross administrative borders.