Official Caption: "COAST GUARDSMAN TREATS WOUNDED NAZI PRISONER: Coast Guardsman William Crumbaugh, pharmacist's mate first class, of Des Moines. . .wipes blood from the face of the chief engineer of a Nazi U-boat which was sunk by a Coast Guard combat cutter's precisely placed depth charges. The engineer was wounded by shrapnel in a sharp mid-Atlantic engagement that spelled doom for the enemy undersea raider. He was picked up with 21 other German seamen by a second Coast Guard cutter." Date: 17 April 1943; Photo No.: 1575; Photographer: Bob Gates Source - NARA Description: The Chief Engineer of the U-175 and ranking POW aboard Duane, Oberleutnant (Ing.) Leopold Nowroth, is treated by Duane crewman PhM1c William Crumbaugh, USCGR. Nowroth ensured the U-boat's sinking by opening most of the submarine's flood valves before he abandoned ship.