Observator Instruments OMC-140, Installation Manual

Page: 43 / 68

OMC-140 Installation Manual Page 43
10 Digital interface
10.1 NMEA software
10.1.1 Inputs:
The Display accepts the following NMEA input messages with a maximum rate of 4 per second:
$xxDBK
Depth Data
$xxDDC Dimming control of backlight
$xxDPT Depth Data
$xxGGA GPS Lon Lat position
$xxGMP GNSS Map Projection Fix Data
$xxGST GNSS Pseudo range Error Statistics
$xxHDT Heading from Gyro (replaced by $xxTHS, display accepts both)
$xxMWD True Wind
$xxMWV Relative or Theoretical Wind
$xxROT Rate Of Turn
$xxTHS Heading from Gyro
$xxVBW Water Speed
$xxVER Version info
$xxVHW Speed through water (direction is not used)
$xxVLW Water Distance
$xxVTG Speed and direction over ground
$xxXDR Air Temperature, Sea Temperature, Humidity, Dew point, Barometric Pressure
(measured), Barometric Pressure QNH (Sea level), Barometric Pressure QFE (Runway
level)
Observator Proprietarily Messages (From MeteoLink):
$xxPOBSVIS Visibility Data
$xxPOBSCME Cloud Data
$xxPOBSBTD Lightning Data
Retired sentences (sentences not recommended for new designs since 2008):
$xxMDA
Meteorological Composite
$xxMHU Humidity
$xxMMB Barometer
$xxMTA Air Temperature
10.1.2 Outputs:
All recognized input messages (except the retired NMEA sentences) can be copied to the output
Calculated messages
$xxMWV
Relative or Theoretical Wind
$xxMWD True Wind
Other functions
$xxDDC
Dimming control of backlight