Appendix C: SeaTalk and NMEA Data Received and Transmitted C-1SeaTalk and NMEAData Received andTransmittedAppendix C: SeaTalk and NMEA DataReceived and TransmittedThe following table defines the data received on the NMEA/SeaTalk ports.Data sources are listed in order of priority except where indicated.* If Magnetic Heading is not available, the True Heading and Variation (if available) are used togenerate the magnetic heading.Data Received SourcePosition (LAT/LON) SeaTalk, GGA, RMC, RMA, GLLPosition (Loran C TD’s) GLC, RMA, GTDSpeed and Course Over Ground SeaTalk, RMC, RMA, VTGWaypoint Data SeaTalk, RMB, APB, BWC, BWR, RMB, XTEDepth SeaTalk, DBT, DPTApparent Wind Angle and Speed SeaTalk, MWV (relative)Boat Speed Through Water SeaTalk, VHWTotal Log and Trip Log SeaTalk, VLWWater Temperature SeaTalk, MTWAverage Boat Speed through the Water SeaTalk onlyHeading SeaTalk, HDG, HDM, HDT, VHWLocked Heading SeaTalk only (Autopilot / Steering Compass)Magnetic Variation SeaTalk, RMC, RMA, HDGRudder Angle (not displayed) SeaTalk onlyTime (No priority) SeaTalk, ZDA, GGA, RMC, GLL, BWC, BWRDate SeaTalk, ZDA, RMCMOB data SeaTalk onlyAutopilot Status (Standby / Auto / Vane / Track) SeaTalk onlyCursor Range and Bearing (from Chartplotter)Cursor Range and Bearing (from Radar)SeaTalk onlySeaTalk, RSDGlobal Alarms - Watch alarm, Wind alarm,Autopilot alarms, Depth alarms.Waypoint arrivalSeaTalk OnlySeaTalk, RMB, APBWaypoint/Route Transfer SeaTalk, WPL, RTE
