These were important clues. First, the photos were definitely not Spitzbergen, Bear Island, or any other eastern Atlantic/Arctic site. Secondly, the type IXC boat suggested a distant operation. Such boats were selected for long-range missions. Thirdly, this boat should be easy to identify. Its armament was distinctive. Selinger thus had fresh evidence. In a search that took him through hundreds of U-boat logs, he found at last the log book of U-537 and the name of its young commander, Peter-Schrewe. There, unmistakably stated in Schrewe's meticulous recording of his 1943 mission was this entry from Kiel:
KaLu Schrewe later died on another U-boat mission, when U-537 was sunk with all hands by torpedoes launched from the American submarine "USS Flounder" off Java in 1944. He could never know that 38 years later the drama and danger of his mission were uncovered by a fellow German. Nor would he ever know that his mission would create international headlines and make him a public name in his homeland.
We found the corroded remains of that station, intact except for the transmitter, parts of the encoding device, and one of the module cannisters. German manufacturers' labels were visible on batteries and assorted devices.