island group forming part of the British Antarctic Territory in the Drake Passage of the South Atlantic Ocean. Lying 90 miles (150 km) north of the Antarctic Peninsula, Antarctica, the islands extend for 320 miles (510 km) and have a total area of 1,800 square miles (4,700 square km). Their main use has been for whaling and sealing activities (1906–31) and for Antarctic exploration bases (notably on Deception Island). Barren and snow-covered, the islands were sighted by the sealer William Smith in 1819 and are uninhabited.