Commander Waldemar Kophamel (August 16, 1880 – November 4, 1934) was a successful and highly decorated German U-boat commander in the Kaiserliche Marine during World War I. In his time as commander of and he succeeded in sinking 54 ships for a total tonnage of . One of his notable actions was sinking the Diamond Shoal Lightship No. 71 (LV-71). Before doing so he allowed the crew, as well as survivors they had rescued from another of his victims, the SS Merak, to evacuate the ship.