- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 55°37'41"N 6°19'21"W
- Eastings/Northings: 128016, 645669
- OS Grid: NR280456
- Mapcode Local: GBR BFSV.0SD
- Mapcode Global: WGYHK.VSGN
Location and coordinates are for the approximate centre of Alt Astail within this administrative area.
Geographic features and populated places may cross administrative borders.