Appendix B: SeaTalk and NMEA Data
B-1
Appendix B:SeaTalk and NMEA Data
The following table defines the data received on the NMEA/SeaTalk ports. Data sources
are listed in order of priority unless otherwise indicated.
Data Received
Source
Vessel Position (LAT/LON)
SeaTalk, GGA, RMC, RMA, GLL
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, XTE, APB
Depth
SeaTalk, DPT, DBT
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
Heading
SeaTalk, HDG, HDM, HDT, VHW
Locked Heading
SeaTalk only (Autopilot / Steering Compass)
Magnetic Variation
SeaTalk, RMC, RMA, HDG
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 Radar)
SeaTalk, RSD
Global Alarms - Watch alarm, Wind alarm, Autopi-
lot alarms, Radar alarms, Depth alarms.
Waypoint arrival
SeaTalk Only
SeaTalk, RMB, APB
Waypoint/Route Transfer
SeaTalk, WPL, RTE
Other Data: Datum (SeaTalk, DTM); Satellite Data (SeaTalk, GGA); GPS Data (SeaTalk, GGA); DGPS Data
(SeaTalk, MSS, GGA); WAAS Data (SeaTalk)
* Bridged to SeaTalk (not displayed)
Note:If Magnetic Heading is not available, the True Heading and Variation (if available) are used to gener-
ate the magnetic heading.
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