service. A 9 cm wavelength system known as FuG 240 Berlin was developed, based on captured examples of the Allies' cavity magnetron technology but saw little to no operational use. Operational history and Allied countermeasures On the night of 8/9 August 1941, Ludwig Becker and his radio operator (Bordfunker) Josef Staub, became the first Luftwaffe night fighter crew to intercept an enemy bomber using airborne radar. Flying Dornier Do 215 B-5 of 4.Staffel/NJG 1 "G9+OM" equipped with the FuG 202 Lichtenstein B/C radar, they tracked and claimed a Vickers Wellington bomber shot down. The aircraft shot down was Wellington T2625 GR-B which crashed near Bunde. The British knew in 1942 that Luftwaffe night fighters were having unprecedented success tracking aircraft. A specialist team was set up to attempt to identify the electronic characteristics of any German airborne apparatus. A Vickers Wellington bomber was adapted, with a Technical Officer and monitoring equipment in the fuselage. This aircraft flew on bombing raids as a decoy, hoping to be intercepted. In December 1942, on the 18th sortie, it was tracked and intercepted by a Luftwaffe night fighter, sustaining heavy damage and then ditching in the sea off Kent, England. The aircrew transmitted and brought back the electronic data, surviving the ditching. The electronics specialist, Pilot Officer Jordan, was awarded the Distinguished Service Order, unusual for that rank of officer. Following the capture in May 1943 of the Ju 88 R-1, Werknummer 360 043—factory number that was equipped with it, the Allies were able to jam and track the early FuG 202 and 212 sets by the summer of 1943. During several months in this period they rendered these sets almost useless by blinding them with Window, termed Düppel by the Germans. Full jamming of the SN-2 took longer but was finally accomplished by the Allies following the mistaken landing due to a navigation error of a Ju 88G-1 night fighter from 7.Staffel/NJG 2 at RAF Woodbridge, equipped with both the Flensburg radar detector and the SN-2 radar on July 13, 1944, compromising both systems to the Allies. Some Allied aircraft were then equipped with 'Piperack' which countered the Lichtenstein SN-2 aerial intercept radar. Much more dangerous were Mosquito intruders equipped with a device called Serrate to allow them to track German night fighters by emissions from their Lichtenstein B/C, C-1 or SN-2 sets. The corkscrew manoeuvre was developed to remove an attacked heavy