"Fighting French Corvette Sinks 2 U-boats. 14 March 1943, Greenock, the Fighting French Corvette Aconit Sank Two U-boats by Gunfire and Ramming While Escorting An Atlantic Convoy Through U-boat Pack on 10 March 1943. the Second Submarine Had Just Torpedoed the British Destroyer HMS Harvester . the Aconit Steamed To a British Port With Survivors From the Harvester and a Merchantman, and Prisoners From the Two U-boats." German U-boat prisoners sitting under the depth charges of FFS ACONIT which helped to surface the 2 submarines sunk.