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TheNMEA0183standardcarriessimilarinformationtoSeaTalk.

Howeverithastheimportantdifferencethatonecablewillonly

carryinformationinonedirection.ForthisreasonNMEA0183is

generallyusedtoconnectadatareceiverandatransmittertogether,

e.g.acompasssensortransmittingheadingtoaradardisplay.This

informationispassedin‘sentences’,eachofwhichhasathree

lettersentenceidentier.Itisthereforeimportantwhenchecking

compatibilitybetweenitemsthatthesamesentenceidentiersare

usedsomeexamplesofwhichare:

•VTG-carriesCourseandSpeedOverGrounddata.

•GLL-carrieslatitudeandlongitude.

•DBT-carrieswaterdepth.

•MWV-carriesrelativewindangleandwindspeeddata.

NMEAbaudrates

TheNMEA0183standardoperatesatanumberofdifferent

speeds,dependingupontheparticularrequirementorequipment

capabilities.Typicalexamplesare:

•4800baudrate.Usedforgeneralpurposecommunications,

includingFastHeadingdata.

•9600baudrate.UsedforNavtex.

•38400baudrate.UsedforAISandotherhighspeedapplications.

2.4Packcontents

Unpackthedisplayunitcarefullytopreventdamage.Savethe

cartonandpackingincasetheunithastobereturnedforservice.

Planningtheinstallation

Raymarine C120W User Manual

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