The Blue Fox was a lightweight frequency agile I-band airborne radar designed for use on the British Aerospace Sea Harrier FRS.1, with two roles, airborne interception and air-to-surface search and strike.
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Blue Vixen was a lightweight (145 kg) multimode, coherent, pulse Doppler I-band airborne radar, developed from the previous Ferranti Blue Fox radar, and designed for use on the British Aerospace Sea Harrier FA2.