Story of how Britain is overcoming the problem of Germany's submarines.
Full titles read: "MODERN PIRATES"
MS German submarines leaving harbour, and at sea in Atlantic, with shots of interior of submarines with crews at their stations. Several shots of graphs showing how the amount of British losses in tons has dropped over the last few months. Various shots of warships of the British Royal Navy. L/Ss of depth charges exploding at sea.
Original negative exists.