The USS Stefansson (NCC-2818) was a Emperor-class Starfleet explorer starship commissioned on 2382 into Admiral Truman's Starfleet Third Fleet. (Star Trek: Pioneer) The Stefansson was under the command of Captain Connor Burt in 2382, with Commander Sally Romero as the executive officer. The Stefansson was named after Vilhjalmur Stefansson, a Canadian Arctic explorer from the 20th century. In 2382, the Stefansson participated in the last part of the Battle of Minark. ("Torment and Woe") In early 2383, the Stefansson accompanied the USS Pioneer to the planet of Yoth. ("The Forgotten Planet")