Supported datagram formats for speed log information
An external speed sensor is typically a global positioning system (GPS) or a dedicated speed log.
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When enabled, the vessel’s current speed is shown on the top bar. The following datagram formats are supported:
NMEA VTG
The NMEA VTG datagram contains the actual course and speed relative to the ground.
NMEA VBW
The NMEA VBW datagram contains water- and ground-referenced vessel speed data.
NMEA VHW
The NMEA VHW datagram contains the compass heading to which the vessel points, and the speed of the vessel relative to the water.
NMEA CUR
The NMEA CUR datagram contains multi-layer water current data. This includes the depth and speed of the current.