True windspeed for ship mount

[originalfoo]

When mounted to a ship, the fact that the ship is moving causes an offset on the anemometer readings. As such, need to subtract the ship velocity from the anemometer reading to get actual wind velocity.

This will likely require using GPS and/or IMU to calculate ship velocity.

[originalfoo]

Note: Likely that ship itself will also be affecting anemometer readings. Not sure how to overcome that other than putting the sensor higher than any structural part of ship?!

EDIT: If direction of ship is known, could potentially have 2 anemometers and choose the least affected one at any given time.