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The echo principle Brief history The radio wave The propaga
The transmitter The aerial Transmitreceive arrangements
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angle beam-width bearing cursor buoy cathode-ray tube cause centre Chapter chart circuit coastline corner reflector course and speed coverage diagram curve decrease depends detection range direction display distance echo pulse echo strength echo trails effect electronic energy equipment equivalent echoing area false echoes field strength frequency give heading marker height klystron land lobe magnetron marine radar maximum miles movement nautical miles navigation objects observer obtained operation oscillation paint picture pilotage plane Plate plot position possible pulse-length racon radar aerial radar band radar beam radar horizon radar range radar reflector radar set radio waves ramark range and bearing range rings range scale receiver reflection refractive index relative rotating scanner screen sea clutter selsyn set and drift shadow sectors shape ship shore radar side-lobes signal slotted waveguide strong echoes super-refraction target transmitter True motion usually valve vertical vessel visibility voltage waveguide wavelength width