A passive radar reflector shall be carried with:

Octahedral circular sector plates of minimum diameter 300mm (12 inches) or octahedral rectangular plates of minimum diagonal dimension 405mm (16 inches).
or
A non-Octahedral reflector with a documented Root Mean Square minimum Radar Cross Section (RCS) area of 2 m2 from 0-360 degrees in azimuth and +/- 20 degrees in heel.

Radar Reflectors Rig & Mast Mount

Trem Octahedral Radar Reflector 16 inch RORC

Trem Octahedral Radar Reflector 16 inch RORC

£25.54

Trem Octahedral Radar Reflector 18 inch IOR

Trem Octahedral Radar Reflector 18 inch IOR

£30.44

Trem Tubular Radar Reflector Yacht

Trem Tubular Radar Reflector Yacht

£24.27