- Category: Water Feature
- Type: Island
- Latitude/Longitude: 54°34'19"N 0°52'54"W
- Eastings/Northings: 472381, 520233
- OS Grid: NZ723202
- Mapcode Local: GBR QH8K.VS
- Mapcode Global: WHF89.FB8Q
Location and coordinates are for the approximate centre of Hummersea Scar within this administrative area.
Geographic features and populated places may cross administrative borders.