Raymarine ST70 Instrument - Wind and Speed Calibration

4.4Windsetup
Calibratingwindspeed
•Youwillneedtobeunderway,withsufcientspacetoturnina
largeslowcircleunhindered.
•Conditionsshouldbecalmorslightwaterandasteadybreeze.
WiththelistoftransducersavailabledisplayedfromtheTransducer
Setupmenu.
1.PressENTERtoproceedtothetransducersetupoptions.
2.SelectWindthenCalibrateVanefromtheavailableoptions.
3.PressENTERandfollowtheon-screeninstructionstocomplete
thecalibration.
Aligningthewindvane
Aligningthewindvaneensuresthatthewindanglereadingis
accurate.
•Youwillneedtobeunderway,withsufcientspacetomaneuver
unhindered.
•Conditionsshouldbecalmorslightwaterandasteadybreeze.
Headdirectlyintothewind,thenfollowtheinstructionsbelow.
WiththelistoftransducersavailabledisplayedfromtheTransducer
Setupmenu:
1.PressENTERtoproceedtothetransducersetupoptions.
2.SelectWindthenAlignVanefromtheavailableoptions.
3.Checkthatyouarestillheadingdirectlyintothewind,then
pressENTERtoacceptthealignmentandreturntotheWind
transducersetupmenu.
4.5Speedcalibration
Speedcalibrationinvolvesaligningthelogspeed(SpeedThrough
Water)totheSpeedoverground(SOG),underzerotideconditions.
Theobjectofspeedcalibrationistoensurethatthespeedreadings
attheinstrumentsaretrueindicationsoftheboatspeed.
Speedtransducerperformanceisaffectedbyitspositionand
water-owcharacteristicsatdifferentspeeds.Itisadvisabletocarry
outcalibrationatvariousspeedsacrosstherangeofyourboat.
Calibratingspeed(conventionaltransducers)
•Youwillneedanaccuratespeedoverground(SOG)value,e.g.
determinedfromaGPSconnectedintoyourSeaT alksystem.
•Youwillneedtobeunderway,withsufcientspacetomaneuver
unhindered.
•Conditionsshouldbecalmwaterwithaslacktide.
Note:Itisimportantthatthereisnotide.Theaffectoftidal
currentwouldbetopreventanaccuratespeedcalibration.
WiththelistoftransducersavailabledisplayedfromtheTransducer
Setupmenu:
1.PressENTERtoproceedtothetransducersetupoptions.
2.SelectSpeedthenCalibrationfromtheavailableoptions.
3.Calibrateeachspeedasfollows,startingwiththelowest:
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ST70InstrumentUserreference