During WW2, Lt. Rip Crandall, who was a yachtsman before the war, takes command of the USS Echo, a sailing ship, for a secret mission in waters patrolled by Japanese warships.During WW2, Lt. Rip Crandall, who was a yachtsman before the war, takes command of the USS Echo, a sailing ship, for a secret mission in waters patrolled by Japanese warships.During WW2, Lt. Rip Crandall, who was a yachtsman before the war, takes command of the USS Echo, a sailing ship, for a secret mission in waters patrolled by Japanese warships.