Raymarine LIGHTHOUSE 3 - 12.11 Doppler Radar overview; Doppler mode

12.
11DopplerRadaroverview
DopplerRadartechnologymakesiteasiertotrackmovingtargetswithsignificantgroundspeed
exceeding3knots.
TypicallyDopplerRadarworksbestwithobjectsthataremovingdirectlytowardsorawayfromthe
vessel.DopplerRadarcanhighlightonlythosetargetsthataremovingrelativetothevessel(e.g.
otherboats,butnotlandorbuoys,forexample).
DopplerRadarworksbytransmittingamicrowavesignalwhichisthenreflectedoffadesiredmoving
targetatadistance.Byanalyzinghowtheobject'smotionhasalteredthefrequencyofthereturned
signal,theDopplerRadarcaninterpretthevariationtoprovidehighlyaccuratemeasurementsofa
target'sdirectionoftravel,relativetotheRadarscanner.
DopplerRadartechnologyisparticularlybeneficialinamarineenvironment,wherepoorweather
conditionsandvisibilitycanmaketargettrackingdifficult.Additionally,itisnotalwayseasyto
interprettheinformationdisplayedbytraditionalRadartechnology.WiththeintegrationofDoppler
information,theprocessofmatchingon-screenradarreturnswithreal-worldobjectsbecomes
amuchsimplertask.
Dopplermode
WhenacompatibleRadarisconnectedDopplermodeisavailable.
Dopplermode—Enablinganddisabling
DopplermodeisenabledfromtheMainmenu: Menu>Doppler.
WithDopplermodeenabledthecolorpalettewillchangetothedefaultDopplerpalette,all
approachingtargetswillbecoloredRedandalltargetsmovingawayfromyouwillbecoloredGreen.
Dopplermodeissuspendedatrangesof12nmandgreater.TheRadarcolorpalettewillremain
thesamebuttargetswillnotbehighlighted.
Dopplermode—Colorpalettes
DopplerhasuniquecolorpaletteswhichhelptoensuretheRedandGreenDopplertargetsstand
outfromtheRadarimage.WhenDopplerisenabledthestandardcolorpalettesettingwillshowonly
theuniqueDopplercolorpalettes: Dopplergrey, Dopplerblueand Doppleryellow.
TheColorpalettescanbeselectedfromthePresentationtab:Menu>Settings>Presentation.
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