H2S

…a radar mapping device, code-named H₂S, that displayed reasonably detailed pictures of coastal cities such as Hamburg, where a clear contrast between land and water allowed navigators to find the target areas. In order to “spoof” the Germans’ radar warning system, RAF planes dispensed “window,” which consisted of clouds of…

…onboard radars, such as the H₂S blind bombing system, that could produce maplike pictures of terrain beneath the aircraft through clouds or in darkness. From 1943, powerful four-engined bombers such as the Handley Page Halifax and the Avro Lancaster, carrying H₂S radar and heavy armament, kept RAF bomber losses within…