- Category: Water Feature
- Type: Island
- Latitude/Longitude: 56°58'32"N 7°25'4"W
- Eastings/Northings: 70956, 800220
- OS Grid: NF709002
- Mapcode Local: GBR 8B28.WQJ
- Mapcode Global: WGV52.1X0T
Location and coordinates are for the approximate centre of Alt within this administrative area.
Geographic features and populated places may cross administrative borders.