A potentially interesting film is severely hampered by routine handling. When a Nazi U-boat is abandoned by its crew, the British capture the sub. They find its codebook still on board, along with the complete ship's log. The sub is outfitted with British seamen who infiltrate a "wolfpack"
of Nazi U-boats. But the ruse is discovered and they engage in battle. The damaged U-boat manages to escape but ends up destroyed on a reef. The seamen are attacked by a British frigate which rescues the sailors and finds that the crew consists of fellow Englishmen. Everything is standard, with a
plodding direction that moves the story forward without providing much insight. Ther...