Installation manual

SimradES70
3llll.ll,a=latitudenorth/south,positionindegrees,minutesandhundredths.
CharactersN(North)orS(South)identiesthebearing.
4yyyyy.yy,a=longitudeeast/west,positionindegrees,minutesandhundredths.
CharactersW(West)orE(East)identiesthebearing.
5hhmmss.ss=coordinateduniversaltime(UTC)ofposition.
6A=status,charactersA(datavalid)orV(datanotvalid)areused.
7a=modeindicator.
HDGHeading,deviationandvariation
Thistelegramcontainstheheadingfromamagneticsensor,whichifcorrectedfor
deviationwillproducemagneticheading,whichifoffsetbyvariationwillprovidetrue
heading.
Format
$--HDG,x.x,z.z,a,r.r,a*hh<CR><LF>
Headingconversions
•Toobtainmagneticheading:Addeasterlydeviation(E)tomagneticsensorreading,
orsubtractwesterlydeviation(W)frommagneticsensorreading.
•Toobtaintrueheading:Addeasterlyvariation(E)tomagneticheading,orsubtract
westerlyvariation(W)frommagneticheading.
Formatdescription
1––=talkeridentier
2HDG=telegramidentier
3x.x=magneticsensorheading,degrees
4z.z,a=magneticdeviation,degreeseast/west
5r.r,a=magneticvariation,degreeseast/west
HDMHeading,magnetic
Thistelegramcontainsvesselheadingindegreesmagnetic.Thetelegramisnolonger
recommendedforuseinnewdesigns.
ItisoftenreplacedbytheHDGtelegram.
Format
$--HDM,x.x,M*hh<CR><LF>
Formatdescription
1––=talkeridentier
2HDM=telegramidentier
3x.x=headingindegrees,magnetic
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