As long ago as 1948 the British Admiralty published their reservations about the traditional octahedral radar reflector, pointing out that even in the catch rain position, by the time it is heeled only 15 Deg. it has only a 50% chance of being seen by radar.
EchoMax EM230+
EchoMax reflectors comprise of a three stack array of laser cut aluminum enclosed in a fiberglass or polyethylene case. At each end 8/10mm diam. fixings enable a standing rigging or halyard hoist or mast mounting.
Manufactured in a light anticorrosion alloy. It comes with protective plastic cap on each apex. This radar reflector folds down for easy storage when not required. Traditional octahedral design.