Sealer's Cave. Code: MSEALC. Height: 27m. 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. Image supplied by Christaan Brink (Sealer, Marion 70). In the photo is Johan van der Vyver (Sealer, Marion 70).