The National Marine Electronics Association (NMEA) is the unifying force behind the entire marine electronics industry, bringing together all aspects of the industry for the betterment of all in our business.

NMEA has become a developer, maintainer and distributor of various documents and standards related to the marine electronics industry. NMEA standards have been accepted as the common practice for how to share specific data information between competing entities or companies since the late 1970s.

The NMEA standards defines both the electrical connnection and the communication protocol.


NMEA 0183 Sentences Processed
$__APB Autopilot
$__BOD Bearing and origin to waypoint
$__BWC Bearing and distance to waypoint
$__DPT Depth
$__DBT Depth
$__GGA Global Positioning System Fix Data
$__GLL Geographic Position, Latitude / Longitude and time
$__GSA DOP and active satellites
$__GSV Satellites in view
$__GSS Satellites in view
$__HDM Heading
$__HDT Heading
$__HDG Heading
$__MTW Water temp
$__MWV Wind
$__RMB Recommended minimum navigation information
$__RMC Recommended minimum specific transit data
$__RTE Route list
$__RSD Radar
$__TLL Radar target
$__TTM Radar tracked target
!__VDM AIS receiver
!__VDO AIS transponder
$__VHW Speed and Heading
$__VWR Wind
$__VWT Wind
$__VTG Track Made Good
$__WPL Waypoint location
$__XTE Cross Track Error
$__ZDA UTC Date

NMEA 2K PGNs Processed
127250 Heading
127258 Magnetic Variation
128259 Speed
128267 Water Depth
129026 COG & SOG
129029 Position
129539 DOPs
129540 Satellites in View
130306 Wind
130312 Water temperature