Data
Receiver
(receive)
Transceiver
(transmit)
Transceiver
(receive)
TimeYesYesYes
Ship’sposition
YesYesYes
COG
YesYesYes
SOG
YesYesYes
Gyroheading
Yes
Yes*
Yes
Rateofturn
YesNoYes
Navigational
status
YesNoYes
Safetymessage
YesNoYes
*ClassBtransceiversdonottransmitaGyroheadingunlessthe
transceiverisreceivinganNMEAHDTsentencefromanexternal
source.
Datareportingintervals
AISinformationisclassedaseitherstaticordynamic.Static
informationisbroadcast,whendatahasbeenamended,orupon
request,orbydefault,every6minutes.
Thereportingratesfordynamicinformationdependonspeedand
coursechange,andaregiveninthefollowingtables.
Note:Thereportingratesshownhereareforreferenceand
maynotbetherateatwhichinformationisactuallyreceivedby
yourAIStransceiver.Thisisdependentonanumberoffactors,
includingbutnotlimitedtoantennaheight,gainandsignal
interference.
ClassAsystems
ShipsDynamicConditions
Reportingrate
Atanchorormoored3Minutes
0-14knots
10Seconds
0-14knotsandchangingcourse
3
1
/
3
Seconds
14-23knots
6Seconds
14-23knotsandchangingcourse2seconds
Fasterthan23knots2seconds
Fasterthan23knotsandchanging
course
2seconds
ClassBsystems
ShipsDynamicConditions
Reportingrate
0to2knots3Minutes
Above2knots
30Seconds
OtherAISsources
Source
Reportingrate
SearchandRescue(SAR)aircraft
10seconds
Aidstonavigation3minutes
AISbasestation
10secondsor3.33seconds,
dependingonoperatingparameters
Importantinformation
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