His most successful intruder operation took place on the night of the 17/18 August 1943, when he participated in 100 Group's support of RAF Bomber Command's Operation Hydra. Braham had decided that it was best to employ the British night fighters in a freelance role. Instead of operating over known German airfields, he elected to interpose the Beaufighters between the outward bomber stream and German airfields in the Netherlands, Germany and Belgium. He hoped that the echoes made by the Beaufighters on the German Lichtenstein radar would attract enemy aircraft and divert them from the bombers.