Hijinks and spyjinks lighten this effective comedy by Richard Murphy, based -- very loosely -- on an actual incident in World War II. The place is somewhere in the Pacific and the not-so-good ship USS Echo, captained by the comic Lt. Rip Crandall (Jack Lemmon), has a very specific assignment. The floating anachronism has to safely carry an Australian spy deep into enemy territory where he will be stationed to report on the Japanese fleet's activities. Since the Echo should have been dismantled and sold for its parts long ago, this assignment is not easy. As the military and its stereotypical traits are parodied with sophistication and sharp humor, the Captain and his motley crew do their best to successfully complete their mission.