Marion Island, the larger of the Prince Edward Islands group, is situated at 46°54' South and 37°5' East in the Southern Indian Ocean. The island is situated in the 'roaring forties' and lies approximately 1770 km south east of Port Elizabeth, South Africa. The French Crozet Island Group lies some 950 km to the east. Marion Island is about 290 km square in area with 72 km of mostly cliff-face coastline.

The island group was formally annexed by South Africa in 1947 and since then has been permanently occupied by South Africans. The research station built on the eastern coast houses a weather office and a variety of research programmes in the natural sciences are run.
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