Hell Boats (1970)

An American officer is assigned a top-secret mission during WWII in Hell Boats (1970). Lt. Comdr. Jeffords (James Franciscus) is serving with the British Royal Navy when he is assigned  a mission to destroy German bombs housed in a former Italian submarine base in Sicily. Along with his friend, Chief Petty Officer Yacov (Reuven Bar-Yotam), he plans to use a Trojan horse of captured boats to penetrate behind enemy lines, but first he's going to penetrate his commanding officer’s wife. Elizabeth Shepherd is the blonde beauty who tempts the Naval hero by tanning her luscious life preservers in front of him on the beach. All aboard!