Ralf-Reimar Wolfram

Ralf-Reimar Wolfram was a Korvettenkapitän during World War II. During his career he commanded two U-boats for a total of 118 days at sea spanning four patrols. During his third patrol he sank the, an American liberty ship. Robert Gray was a straggler from convoy HX 234 en route to Britain.
For Wolfram's fourth patrol, he commanded during Operation Caesar. He was killed when U-864 was sunk by the British submarine. This was the only known instance of one submerged submarine sinking another submerged submarine. U-864 remains Wolfram's grave to this day.