Function SeaTalk ID NMEA ST -> NM NM->ST Display Internal
Depth 0 DBT X X X
Speed t. Water 20 VHW X X X
Speed t. Water 26 VHW - - - -
Trip Milage 21 VLW X X
Total Milage 22 VLW X X
Temperature 23 MTW X X X
Temperature 27 MTW X X X X
Total / Trip Milage 25 VLW X X X
Wind Angle 10 MWV X X X X
Wind Speed 11 MWV X X X X
Compass 84 HDM  (VHW) X X
Compass ST40 89 HDM X X
Speed over ground 52 RMC X X X X
Course over ground 53 RMC X X X
Lamp Intensity 30 X X
Lattitude 51 RMC X X X
Longitude 50 RMC X X X
Special NM->ST any $STALK X X X
Configuration - $SNBSE X
ST->NM = Read from SeaTalk bus, send to NMEA Bus
NM->ST = Read from NMEA Bus, send to Seatalk Bus
special $STALK,xx,yy,zz  Sends Command xx with Parameter yy,zz to SeaTalk