A German submarine attacked by depth charges from a Polish destroyer protecting a convoy.
Title missing: "U Boat Attacked".
VS Good shots of a very large convoy of merchant ships at sea in the Atlantic with a destroyer escort.
A U-boat is sighted by the escort aircraft which marks the spot with flares A Polish destroyer then makes several attacks over the area dropping depth charges to bring up the German submarine. Good shots of depth charges being dropped and exploding.
GV Panning shots of large convoy of ships at sea.