At 15.28 hours on 29 June 1944, U-984 fired a spread of two LUT torpedoes at convoy ECM-17 about 30 miles south of St. Catherine’s Point, Isle of Wight. The first struck the Edward M. House and the second the H.G. Blasdel. Six minutes later, the U-boat fired a single torpedo at one of the damaged ships and missed but struck the John A. Treutlen. At 15.43 hours, a Gnat was fired which struck the James A. Farrell.

The Edward M. House (Master Austin Stuart Fithian) was struck by one torpedo under the stern as she was proceeding as the third or fourth ship in the port column. The explosion threw up a column of water several hundred feet in the air, stoved in the forepeak, flooded the #1 port and starboard deep tanks and buckled the shell plating and the collision bulkhead. The engines were stopped briefly during the damage was examined and then followed convoy. One armed guard and one crewman were injured of the nine officers, 33 men, 28 armed guards (the ship was armed with two 3in and eight 20mm guns) and 587 troops on board. The ship continued to the Normandy beachhead, discharged her troops and equipment the same day and returned to the United Kingdom on 1 July. She was repaired at Newcastle-upon-Tyne from 9 July to 31 October and then sailed for New York, returning to service.