Originally Posted by treilley
I agree that something was not properly re-connected. Most problems like this are traced back to the last thing that changed. Very elementary troubleshooting procedure.
Shouldn't the instrument use SOG and COG to get an accurate true wind speed and direction? Your knotmeter is affected by current which has no relevance on true wind calculations.
Do any of the manufacturers do this? I am not aware of any.
There are two different types of true wind. I prefer true wind calculated from the gps (sometimes called ground wind). The Raymarine st60 etc will not display this only "true wind" derived from the knotmeter.
More sophisticated systems such as from B&G will display either.