RayNmeaSimulatorUSER GUIDE · v0.1.1
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Supported NMEA0183 Sentences

RayNmeaSimulator can receive (RX) and transmit (TX) the instrument messages listed below. In Viewer, received data creates or updates matching instruments. In Generate, enabled instruments supply outgoing values. The table describes available fields and message-specific limits.

Instrument TX requires Generate mode, individual Enable/reporting interval, a ready output and explicit Enable Sending. Local generators additionally use Enable/Dispatch. Stop/F12 revokes external Sending; it does not by itself stop local vessel movement. Actisense Release is RX-only; Debug TX is experimental. Signal K publishes only its existing mappings and has no Viewer subscription. See Signal K for the publishing limits.

RayNmeaSimulator supports 18 NMEA0183 instrument formatters. Find each entry offline by its number or formatter.

Message / nameFunctionRXTXLimits / notes
APB
Heading/Track Controller (Autopilot), Sentence B		XTE, steering direction, bearings and heading-to-steer.YesYesManual RX/TX; automatic Vessel Movement updates are not available.
DBT
Depth Below Transducer		Depth in equivalent distance units.YesYesCanonical metres.
DPT
Depth		Depth, offset and range.YesYesOffset stays separate from depth.
GGA
Global Positioning System Fix Data		UTC, fix position, quality, satellites and altitude.YesYesModeled fix fields; not every GNSS extension.
GLL
Geographic Position, Latitude/Longitude		Position, time and status.YesYesCurrent supported fields.
GSA
GNSS DOP and Active Satellites		Fix selection, satellite IDs and dilution.YesYesTwelve satellite slots; modeled sentence form.
GSV
GNSS Satellites in View		Satellite observation page.YesYesBounded page records; page number is part of identity.
HDG
Heading, Deviation & Variation		Magnetic heading with deviation/variation.YesYesDirection signs retained; no inferred reference conversion.
HDT
Heading, True		True vessel heading.YesYesDegrees on wire, radians canonical.
MTW
Water Temperature		Water temperature.YesYesCelsius on wire, Kelvin canonical.
MWV
Wind Speed and Angle		True/relative wind, speed and validity.YesYesReference-specific streams; supported unit conversion.
RMB
Recommended Minimum Navigation Information		XTE, destination and approach information.YesYesManual RX/TX; automatic Vessel Movement updates are not available.
RMC
Recommended Minimum Specific GNSS Data		Position, course, speed, UTC and variation.YesYesSupported sentence form; not every optional revision field.
RTE
Routes		Route name and waypoint-ID page.YesYesBounded page count/length; route/page identity.
VHW
Water Speed and Heading		Water speed, true and magnetic heading.YesYesDoes not derive missing headings.
VTG
Course Over Ground and Ground Speed		True/magnetic course and speed.YesYesCurrent fields and unit conversions.
WPL
Waypoint Location		Waypoint name and position.YesYesBounded name/ASCII; waypoint identity matters.
ZDA
Time & Date		UTC day/month/year and local-zone offset.YesYesModeled offset fields.

Talker IDs and sentence boundaries

The table lists formatters, not fixed talker IDs. GPRMC and GNRMC both use RMC; Viewer retains talker identity. Incoming sentences need the supported field format and a valid checksum. AIS VDM/VDO, DSC/DSE and unlisted formatters are not available as sentence instruments. NMEA2000 AIS support is separate.

NMEA0183 uses the configured serial port and baud rate. The application has no generic NMEA0183 TCP/UDP server; use an appropriate external gateway only when needed. Structured route/satellite pages must fit implemented record and sentence-length bounds; unavailable data is not silently replaced with a valid zero.

NMEA PGNs and Sentences · Supported NMEA2000 PGNs · Viewer vs Generate · Enable, Dispatch and Sending · Device Diagnostics · Route Overview · Known Limitations

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