How One British Analyst Traced a Single Call-Sign to Locate Hitler’s Hidden Baltic Sea U-Boat Pen

In the final weeks of WW2, a single repeated radio call-sign led British codebreakers and reconnaissance pilots to a U-boat construction pen hidden inside a Baltic granite cliff. This is the untold story of Operation Goldeneye and the intelligence trail that uncovered Hitler's secret submarine sanctuary. #WW2, #WorldWar2, #History, #MilitaryHistory, #Submarine, #UBoat, #RAF, #Bletchley,