Wout B. wrote:

Especially at low sailing speed and strong current, this can make all the
difference.
The Navman wind instrument can use either SOG or water speed for true wind
calculation.
You can also "fool" any NMEA wind instrument by converting the NMEA RMC
sentence from the GPS (COG) to VHW (speed thru water). A Brookhouse
multiplexer will do this for you. You can load a simple script for this
conversion. You may need a multiplexer anyway if you are building an
integrated instrument system.
Hi,

You can fool any NMEA wind instrument. But if you have a SeaTalk only
instrument, you have to "fool" the SeaTalk device.
If someone is interested in playing with it have a look at
www.tklinux.de

Frank