Action in the North Atlantic is a 1943 war film, featuring Humphrey Bogart and Raymond Massey as sailors in the Allied merchant marine in World War II.
During their brief leave, Steve spends time with his wife Sarah (Ruth Gordon), while Joe meets and marries singer Pearl O'Neill (Julie Bishop). Then, it is back to sea on a new Liberty ship, on a convoy carrying vital supplies to the Russians at Murmansk.
The convoy is attacked by a wolf pack. There are losses on both sides, but the convoy commander is forced to order his ships to disperse. One persistent U-boat chases after Steve's ship, but loses contact in the night. Two Luftwaffe flying boats find the freighter and attack. Both are shot down, but the second crashes into the bow. Steve is shot in the leg during the battle; Joe has to take command. The U-boat sights the ship again and hits her with a torpedo. Joe orders the men to set fires and make smoke so that it appears as if the ship is sinking. When the submarine surfaces to finish her off, Joe rams and sinks it. The freighter then limps into Murmansk to a warm Russian welcome.
Authentic German and Soviet airplanes and language were used in the film, a rare occurrence in movies of this era.