Telegramformats
Telegramformats
ThischapterdetailsthestandardNMEA,thirdpartyandproprietarySimradtelegrams,
aswellas–ifapplicable–dedicatedleformatsfordatatransfer.
Accordingtotheirwebsite,theNationalMarineElectronicsAssociation(NMEA)isthe
unifyingforcebehindtheentiremarineelectronicsindustry,bringingtogetherallaspects
oftheindustryforthebettermentofallinourbusiness.
AllNMEA,thirdpartyandproprietarytelegramsavailablearenotdescribedhere,only
thoseusedbytheES70.Ifthespecicationsheredifferfromtheoriginalspecications
publishedbyNMEA,thespecicationsissuedbyNMEAmustberegardedasthe
correctversion.
Topics
•AbouttheNMEAtelegramformatonpage263
•SpecicationofNMEAtelegramsonpage265
•Proprietarytelegramsandformatsonpage273
•Proprietarythirdpartytelegramsandformatsonpage281
Relatedtopics
•http://www.nmea.org
.
AbouttheNMEAtelegramformat
TheSimradES70cansendandreceiveinformationtoandfromseveraldifferent
peripherals.Alltransmissionstakeplaceastelegramswithdatasentences.Each
telegramhasadenedformatandlength.
TheNMEA0183standardisthemostcommonprotocolusedtoreceiveandtransmitdata
toandfromperipheralsensors.AparametricsentencestructureisusedforallNMEA
data.Thesentencestartwitha“$”delimiter,andrepresentthemajorityofapproved
sentencesdenedbythestandard.Thissentencestructure,withdelimitedanddened
datales,isthepreferredmethodforconveyinginformation.
FormoreinformationabouttheNMEAstandard,theformatandthedatasentences,refer
totheirofcialpublications.TheirdocumentNMEA1083-Standardforinterfacing
marineelectronicdevicesexplainstheformatsindetail.Thedocumentcanbeobtained
fromhttp://www.nmea.org
.
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