The Wackiest Ship in the Army

During World War II, the Army recruits Navy officer Rip Crandall (Lemmon) to command a battered old schooner for a top-secret mission. Masquerading as a Japanese fishing boat, this nautical nightmare must smuggle a spy through mine-infested waters of the South Pacific. Unfortunately for Crandall, he has inherited a wild crew of butterfingered landlubbers, including First Officer Tommy Hanson (Nelson). Can the dedicated lieutenant whip these comically inexperienced gobs into shape in time to carry out their perilous mission? (official distributor synopsis)