Watertunnel Stream Hut. Code: MWTUNB. Height: 1m. Descriptions and derivations of South African-named geographical features at the Prince Edward Islands with GPS coordinates and photographic records needed to be preserved. John Cooper as part of the Antarctic Legacy Project has compiled the list for Prince Edward Island and Marion Island that includes coordinates of geographical features, height and geographical code. Images supplied by Anche Louw of Antarctic Legacy of South Africa.