OpenMarine

The STW readings on my open marine (opencpn and mxtommy) show apron 50%  lower value than they really are. The main nav system on the boat is a Raymarine system with an itc-5  for converting the log paddle wheel signals into the system. On the Raymarine network the STW agrees with the SOG and seems to display sensible values.

A vYacht router transfers the SeaTalk NG / NMEA 2000 data to the pc / RPi.

Maybe somebody has encountered a similar issue and knows the solution or a possibility to calibrate STW values in opencpn or similar. 

Thanks for the help in advance!

(2022-08-18, 08:10 AM)Maughidhoo Wrote: [ -> ]The STW readings on my open marine (opencpn and mxtommy) show apron 50%  lower value than they really are. The main nav system on the boat is a Raymarine system with an itc-5  for converting the log paddle wheel signals into the system. On the Raymarine network the STW agrees with the SOG and seems to display sensible values.

A vYacht router transfers the SeaTalk NG / NMEA 2000 data to the pc / RPi.

Maybe somebody has encountered a similar issue and knows the solution or a possibility to calibrate STW values in opencpn or similar. 

Thanks for the help in advance!

Look for  the format the data is handlet  .  and presented  .  SignalK  use SI units  .  So NM  become KM   .   in Instrument Panel . you can chosse , what  format you like to see .