In 1805, under Captain George Martin, she was part of the Channel Fleet. Her final battle was fought in a squadron under Admiral Sir Robert Calder at the Battle of Cape Finisterre on 22 July 1805 in the attack on the combined Franco-Spanish fleet off Ushant. The action was fought in heavy weather, part of the time in thick fog. The master and four others were killed and Lieutenant Peter Fisher and six others were wounded.