Green Satin was a doppler radar that provided the Nav with true groundspeed and drift.
Blue Silk was a doppler radar giving the same information as Satin but was designed to operate over water. Hence it's fiitment to the Shackleton
CCWR (Cloud Collision Warning Radar), not a doppler, was a generic term for this type of radar, the RAF used mostly MEL (Echo) versions i.e. E190, 290 etc
Orange Harvest (ESM) was only carried by Shackletons, the most obvious sign was the "spark plug" aerial system on the top of the centre fuselage. This was part of two almost independent systems classified as wide band and narrow band. The origins of this are from a piece of equiment carried by 51 squadron Comets called Breton 1 and 3 qtrs. It was a attempt to provide information on the direction of local radar emitters in one of two bands S and X (old classification).
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