Appendix D: SeaTalk and NMEA Data Received and Transmitted
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Appendix D: SeaTalk and NMEA Data
Received and Transmitted
The following table defines the data received on the NMEA/SeaTalk ports.
Data sources are listed in order of priority except where indicated.
Data Received
Source
Position (LAT/LON)
SeaTalk, GGA, RMC, RMA, GLL
Position (Loran C TD’s)
GLC, RMA, GTD
Speed and Course Over Ground
SeaTalk, RMC, RMA, VTG
Waypoint Identifier
SeaTalk, RMB, APB, BWC, BWR
Bearing to Waypoint
SeaTalk, RMB, BWC, BWR
Distance to Waypoint
SeaTalk, RMB, BWC, BWR
Cross Track Error (XTE)
SeaTalk, RMB, APB, XTE
Depth
SeaTalk, DBT, DPT
Apparent Wind Angle and Speed
SeaTalk, MWV (relative)
Boat Speed Through Water
SeaTalk, VHW
Total Log and Trip Log
SeaTalk, VLW
Water Temperature
SeaTalk, MTW
Average Boat Speed through the Water
SeaTalk only
Heading
HDG, HDM, HDT, VHW, SeaTalk,
Locked Heading
SeaTalk only (Autopilot / Steering Compass)
Magnetic Variation
SeaTalk, RMC, RMA, HDG
Rudder Angle
SeaTalk only
Time (No priority)
SeaTalk, ZDA, GGA, RMC, GLL, BWC, BWR
Date
SeaTalk, ZDA, RMC
MOB data
SeaTalk only
Autopilot Status (Standby / Auto / Vane / Track) SeaTalk only
Cursor Range and Bearing (from Chartplotter)
SeaTalk only
Cursor Range and Bearing (from Radar)
SeaTalk only
Global Alarms - SeaTalk Only
Watch alarm, Wind alarm, Autopilot alarms,
Depth alarms, Waypoint arrival
Waypoint/Route Transfer
SeaTalk, WPL, RTE
* If Magnetic Heading is not available, sthe True Heading and Variation (if available) are used to generate the
magnetic heading.
Appendix D:
SeaTalk and
NMEA Data
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