4. NMEA Output Interface

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The function of the NMEA output INTERFACE is to convert the data present on the TOPLINE BUS into NMEA format so that all the devices communicate with one another.

The function of the NMEA output INTERFACE is to convert the data present on the TOPLINE BUS into NMEA format. Once the NMEA output interface is connected, the following functions are available:

  • Boat speed, daily log, total log
  • Compass heading, UT time, UT date, depth
  • Water temperature, Air temperature – Atmospheric pressure
  • Apparent wind speed, True wind speed
  • Apparent wind angle, True wind angle
  • True wind direction
  • Direction, Heading, Speed to Waypoint
  • Cross-track error, Bottom speed, Bottom heading
  • GPS position

Characteristics

if Depth-finder log sensor:

  • $IIVHW : heading (if compass) and speedo
  • $IIVLW : daily and total log
  • $IIDPT : depth (if probe)
  • $IIMTW : water temperature
  • $IIDBT : depth (if probe)

if anemovane:

  • $IIMWV : apparent wind angle and apparent wind speed
  • $IIMWD : true wind direction and true wind speed (if compass)
  • $IIVWT : true wind angle and true wind speed
  • $IIMTA : air temperature

if compass:

  • $IIHDG : compass (21s max.)
  • $IIHDM : compass – if barometer:
  • $IIMMB : atmospheric pressure GPS frames:
  • $GPZDA : UT time and date (30s)
  • $GPGGA : Position and altitude
  • $GPGLL : Position
  • $GPVTG : Bottom speed and heading in NAV mode only:
  • $IIXTE : cross-track error
  • $IIRMB : WP heading and distance, and cross-track error

Manual