How did the Huff-Duff system help defeat the U-boat menace?
Answer
High-Frequency Direction Finding (Huff-Duff) triangulated U-boat positions from their radio transmissions, combined with improved sonar and airborne radar to turn the tide in the Battle of the Atlantic by mid-1943
Did You Know?
German Admiral Doenitz never fully realized how well the Allies had cracked U-boat communications. When U-boats surfaced to transmit, Allied ships and aircraft could immediately triangulate their position, making every radio call potentially fatal.