Radar Reflector. Arrangement of flat metallic surfaces set at right angles to each other which reflect radar signals back from whence they came. Used to improve the reflective power of small objects.
Radar Simulator. Electronic apparatus, used in training, by which simulated echoes of ships or coastline are made to appear and move upon radar displays.
Raddle. To interlace yarns to form a gasket.
Radiant Heat. Heat transmitted in form of electro-magnetic waves, and not by conduction or convection.
Radiation. Emission of energy, such as light or heat, in the form of electro-magnetic waves that do not heat the medium through which they pass.
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