User manual

Telegramformats
NMEAsentencestructure
Thefollowingprovidesasummaryexplanationoftheapprovedparametricsentence
structure.
$aaccc,c—c*hh<CR><LF>
1“$”:Startofsentence(Hex:24).
2aaccc:Addresseld.Thersttwocharacters(aa)identiestheTalkerID,whilethe
lastthreecharactersaretheSentenceformattermnemoniccodeidentifyingthedata
typeandthestringformatofthesuccessiveelds.
3“,”:Fielddelimiter(Hex:2C).Thischaracterstartseacheldexcepttheaddress
andchecksumelds.Ifitisfollowedbyanulleld,itisallthatremainstoindicate
nodataintheeld.
4c—c:Datasentenceblock.Thisisaseriesofdataeldscontainingallthedata
tobetransmitted.ThedataeldsentenceisxedandidentiedbytheSentence
formatterintheaddresseld.Dataeldsmaybeofvariablelengths,andtheyare
precededbytheFielddelimiter.
5“*”:Checksumdelimiter(Hex:2A).Thisdelimiterfollowsthelasteldofthe
sentence,andindicatesthatthefollowingtwoalphanumericalcharacterscontain
thechecksum.
6hh:Checksum
7<CR><LF>:Terminatessentence
Proprietarytelegrams
InsomeproprietarytelegramsreceivedfromotherKongsbergMaritimeequipment,the$
[e-mail]eldmaythennotbeinuse.
SpecicationofNMEAtelegrams
AllstandardNMEAtelegramssupportedbytheES70arespeciedhere.Theinformation
isextractedfromtheoriginalNMEAspecications.Ifadditionaldetailsaboutthe
individualtelegramformatsarerequired,seetheoriginalsourcele.
Topics
•DBSDepthbelowsurfaceonpage266
•DBTDepthbelowtransduceronpage266
•DPTDepthonpage267
•GGAGlobalpositioningsystemxdataonpage267
•GLLGeographicalpositionlatitude/longitudeonpage268
•HDGHeading,deviationandvariationonpage268
•HDMHeading,magneticonpage269
•HDTHeading,trueonpage270
•RMCRecommendedminimumspecicGNSSdataonpage270
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