After two years' service in the Mediterranean Sea, "Erebus" was refitted as an exploration vessel for Antarctic service, and on 21 November 1840 – captained by James Clark Ross – she departed from Van Diemen's Land for Antarctica in company with . In January 1841, the crews of both ships landed on Victoria Land, and proceeded to name areas of the landscape after British politicians, scientists, and acquaintances. Mount Erebus, on Ross Island, was named after one ship and Mount Terror after the other.