At 21.31 hours on 22 June 1943 the German submarine U-593 fired a spread of four torpedoes at the convoy Elastic about eight nautical miles north-east of Cape Corbelin, Algeria in position 36º59'N, 04º01'E and hit USS LST 333 and USS LST 387 with one torpedo each. The first was beached and declared a total loss, while the latter was towed to Dellys and later repaired. The torpedoeing of these two ships hampers the training for the forthcoming invasion of Sicily (Operation Husky).

USS LST 333 was struck by the torpedo on the starboard side in the stern. The explosion demolished the stern section, carried away the screws and rudder and stopped the engines. About 20 minutes after the hit, the landing crafts USS LCT 244 and USS LCT 19 took the landing ship in tow and proceeded slowly towards the beach. After one hour, the submarine chaser USS SC 503 came alongside and took off 32 injured crew members and 24 injured passengers and brought them to Algiers. After five hours of towing, the stern of the landing craft came aground near Dellys. The crew and passengers were taken off by the landing craft and brought to Dellys. USS LST 333 later sank during a salvage attempt on 6 July.

Hit by U-boat
A total loss on 22 Jun 1943 by U-593 (Kelbling).