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STW reading 50% lower than real
#1
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!
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#2
(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 .
Sailing in a LM23  23" motor sailor i Danmark  .  Mostly In Koege bay  .
Harbored  in SF-Syd  , Copenhagen .
Marine Enginer  ,   Pt. working on power plant 
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