Manannan operates seasonal fastcraft services from Douglas to Liverpool, Belfast and Dublin. The vessel is a 96m Incat vessel built in 1998 in Tasmania. After brief commercial operations she was chartered in 2001 to the US Navy and underwent modifications. She underwent a major refurbishment and modifications when purchased by the Isle of Man Steam Packet Company to replace Viking. Manannan entered commercial operations on 22nd May 2009 from Douglas.