Fitted with FuG 220 Lichtenstein SN-2 radar and the FuG 227 Flensburg and FuG 350 Naxos homing devices, Werk Nr 712273 was stationed at Langendiebach (near Frankfurt, Germany).
On July 13, 1944, Obergefreiter J. Maekle landed 4R+UR in error at Woodbridge, Suffolk, making 712273 the first Ju 88 fitted with FuG 220, FuG 227 and FuG 350 to be captured intact by the Allies. Examination of this aircraft and it's equipment revealed that FuG 220 operated on a frequency of 90 megacycles - a part of the spectrum not covered by the Window anti radar foil strips then used by the Allies, while the homing devices FuG 227 and FuG 350 were found to be respectively tuned to Monica tail warning and H2S navigation/bombing radars used by RAF bombers.[N 1]
- Within 10 days of 4R+UR's capture, the RAF were dropping a new type of Window tailored to FuG 220, while the Monica sets were quickly removed.
- Brown, Eric Melrose. Wings of the Luftwaffe. The Crowood Press Ltd - New edition (14 Feb 1998). ISBN 1853104132. Page 111