2
Introduction
Principle of Measurement
The wind speed sensor has a rotor with three wind cups which spins as the
wind moves past the boat. The Wind speed sensor measures how fast the
rotor is spinning to calculate the wind speed. The wind direction sensor has a
wind vane which points in the direction that the wind is coming from. The wind
direction sensor electronically senses the direction the wind vane is pointing.
With inputting GYRO
（
HDT
）
, SPEEDLOG
（
VBW
）
or GPS (RMC/VTG) data,
calculate and display the true wind speed and direction
（
relative to north
pole
）
.
