A U.S. Navy technician marks down on a vertical chart, in the radar plot room of an aircraft carrier, information provided by radars electronic eye. Radar, developed independently by US, British, French and German scientist, can see further than the human eye can, and its vision is relatively unaffected by night, fog, smoke or rain. Radar set consists of a modulator, a radio frequency oscillator, and antenna with a [?] mechanism, a receiver and an indicator.