Cape Annawan is an ice-covered cape which marks the east extremity of Thurston Island

Thurston Island

Thurston Island is an ice-covered, glacially dissected island, long, wide and in area, lying a short way off the NW end of Ellsworth Land, Antarctica. It is the third largest island of Antarctica, after Alexander Island and Berkner Island...

 and the northwest entrance to Seraph Bay

Seraph Bay

Seraph Bay is an open bay about 15 nautical miles wide, formed at the southeast end of Thurston Island. It is bounded by Cape Annawan on the northwest, Abbot Ice Shelf on the southwest and Dustin Island on the southeast Discovered by members of the United States Antarctic Service in flights from...

. Discovered in helicopter flights from the USS Burton Island and Glacier by personnel of the U.S. Navy Bellingshausen Sea Expedition in February 1960. Named by Advisory Committee on Antarctic Names

Advisory Committee on Antarctic Names

The Advisory Committee on Antarctic Names is an advisory committee of the United States Board on Geographic Names responsible for recommending names for features in Antarctica...

 (US-ACAN) for the ship Annawan, of the United States Expedition of 1829-31, which with the Penguin sailed west from the South Shetland Islands

South Shetland Islands

The South Shetland Islands are a group of Antarctic islands, lying about north of the Antarctic Peninsula, with a total area of . By the Antarctic Treaty of 1959, the Islands' sovereignty is neither recognized nor disputed by the signatories and they are free for use by any signatory for...

in February 1830, holding a course between 62S and 58S and exploring as far as 103W, northward of this cape.