 The airfield was also used for take-off of Heinkel He 111 for initial air-launch testing of V-1s.V-1 launch crew training was at the nearby resort of Zempin, and after the August 1943 Operation "Hydra" bombing of the area, V-1 flight testing was moved to Brüsterort.Peenemünde West also developed World War II night-navigation and radar systems (Dr. Johannes Plendl).