vmg/ true apparent wind not showing on c127 and st60+

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum wadadli,

In order calculate True Wind and VMG, the system must be supplied with each of the following data items:
- apparent wind speed
- apparent wind direction
- heading
- speed through water

It would appear that there may be a problem with your NMEA 0183 speed instrument's NMEA 0183 transmissions. Your MFD may be configured to transmit/receive NMEA 0183 data at either 4800 BAUD (default setting) or 38400 BAUD (most commonly used with AIS receivers) from a talker supporting NMEA 0183 v2.1 or higher protocol. It is recommended that your NMEA 0183 talker producing speed be tested accordingly and per its manufacturer's instructions. Please click here to view a FAQ addressing how the MFD's NMEA 0183 port may be tested.