- Category: Water Feature
- Type: Island
- Latitude/Longitude: 54°44'37"N 4°59'21"W
- Eastings/Northings: 207680, 542856
- OS Grid: NX076428
- Mapcode Local: GBR GJ15.CBV
- Mapcode Global: WH2T6.B1C5
Location and coordinates are for the approximate centre of The Chair within this administrative area.
Geographic features and populated places may cross administrative borders.