Do the simple one first
From the Raymarine manual
4.2 User calibration
The User calibration procedures:
• Linearize and align the wind transducer.
• Select the required wind speed units
Linearizing and aligning the wind transducer
This procedure ensures that the sensors in the windvane transducer are correctly calibrated to record rotation of the windvane, then compensates for any small errors which may exist in the alignment of the wind transducer.
To do this:
1. Power-up the ST60 Wind instrument.
2. Slowly turn the vessel through two complete circles. This procedure automatically linearizes the windvane. A successful linearization is indicated by the digital display flashing and the buzzer sounding three beeps.
3. Hold down the disp and true/app keys for approximately 2 seconds to enter User calibration then use the disp key to select the wind angle screen (see the User calibration flow diagram).
4. Sail directly into the wind and adjust the analog pointer to zero, using the
vmg and tack keys. If you are unable to achieve the required degree of accuracy due to sea conditions, and errors become apparent during subsequent tack operations, repeat this procedure to achieve alignment accuracy.
5. Display the wind speed units screen.
6. Use the vmg and tack keys to select the units you want, either knots (KTS) or meters per second (M/S).
Note: Any speed unit changes will be applied to other SeaTalk instruments.
Leaving User calibration
Hold down the disp and true/app keys for 2 seconds to save your settings, exit User calibration and resume normal operation.
