A cast concrete machine gun post with three gun ports.

Coordinates:

• Decimal degrees: -33.80841 (Latitude) 18.36415 (Longitude)
• Degrees, Minutes & Seconds: S33 48 30 (Latitude) E18 21 50 (Longitude)
• GPS: S 33 48.505 (Latitude) E 18 21.849 (Longitude)
• UTM: 34S 256007 (X) 6255963 (Y)
• Above sea level: 43 ft / 13 m

... also on Robben Island.

Sources:

• University of Cape Town. 2001. Phase 1 Archaeological assessment of Robben Island world heritage site. Rondebosch: Archaeology Contracts Office, Department of Archaeology.