1881 fm Christinia via London to NY on Britania

My great Uncle Charlie/Charley Klanderud. Name was Olsen in Norway, says on his petition for naturalization that he came from Christiania via London on or about the 9th of April 1881 via the ship Britania. don't know if that is the correct spelling for the ship name. I would like to find him on a ships list. I have looked for and cannot find the ship Britania. I would appreciate any help. thank you Connie Bottolfsen Loftus email addy [email hidden] that is an L before the @ sign