For the Seadogs: April 17th 1943. From:
SeaWaves Magazine
1943 - Destroyer escorts USS Emery & Gantner launched
1943 - Frigates USS Sheboygan & San Pedro laid down
1943 - U-175 sunk SW of Ireland, in position 47.53N, 22.04W, by depth charges & gunfire from the USCGC Spencer. 13 dead and 41 survivors
1943 - Destroyer escort USS Gilmore commissioned
1943 - U-1200, U-1271 laid down
1943 - U-314, U-473, U-855 launched
1943 - U-850 commissioned
1943 - Minesweepers USS Motive & Prevail commissioned
1943 - U-631 had a collision with U-71in the North Atlantic. Both boats were damaged, and U-71 had to return to base
1943 - At 0747 & 0749, U-628 fired torpedoes at the convoy HX-233 in grid BE 4615 (47°22N/21°58W) and observed one hit on each of two ships. In fact, Fort Rampart was damaged and the American steam tanker Harrison Smith was missed. At 1130 the same day, U-628 hit the straggling Fort Rampart with a coup de grāce, but the vessel did not sink, until 0326 on 18 April when U-226 finally sank the ship about 900 miles ENE of the Azores with a coup de grāce and gunfire. Fort Rampart was on her maiden voyage. Six crewmembers were lost. The master, 40 crewmembers, six gunners and three passengers (DBS) were picked up by HMCS Arvida & landed at Greenock