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The echo principle Brief history The radio wave The propaga
ia Sectional view of the cavity magnetron
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amplifier angle azimuth beacon beam-width bearing cursor brightness buoy cathode-ray tube centre Chapter chart circuit collision corner reflector course and speed coverage diagram curve depends detection range direction display distance echo pulse echo strength echo trails effect electronic equivalent echoing area factors false echoes field strength frequency give heading marker height IDENTIFY interval land marine radar maximum measurement movement nautical miles navigation normal objects obtained operational picture pilotage Plate plot plotter position possible racon radar aerial radar band radar equipment radar horizon radar observation radar reflector radar set radiation radio waves ramark range and bearing range rings range scale receiver reflection refractive index relative rotation scanner screen sea clutter sea-clutter set and drift shadow sectors shape ship signal specular reflection switch target Teesport tion transmitter True motion usually valve vertical vessel visibility visual voltage wavelength