Apparent Wind Angle - NKE PROCESSOR HR User Manual And Installation Manual

9.8

Apparent Wind Angle

Calibrating the Apparent Wind Angle will adjust the mast alignment error and apply
corrections for the wind shear effects.
This can be done only if the rig (backstays, headstay, kicker...) and sail tuning is
absolutely identical on port and starboard whilst sailing and carrying out the calibration.
The helmsman must keep focused on the telltales and completely ignore any information
coming from electronic instruments to avoid influences. Boat speed and heel must also be
identical from one side to the other. Set the correct sails for the weather conditions. We
recommend at least four legs are sailed in order to compare the readings and determine
an offset value to apply.
Inhibit the true wind correction table and reset the wind shear adjustment value. This can
be done from the home page by pressing on the "Calibration Installation" button, and
then choose "Constants Calibration" (refer to § 6.1.2).
To measure the Apparent Wind Angle you can use the performance software or make the
calculation on your own using the data logged on the USB key embedded in the
Processor HR, or alternatively use the application of the Multigraphic or Gyropilot
Graphic.
Warning! If you work with asoftware such as "Tactique" from Adrena, the offset is
calculated from the function "Apparent Wind Angle". This function is reverse calculated
from the true wind angle and damped for display. Therefore you have to reset the true
wind table, as well as wind shear, and you must apply the offset to the existing value if
different from 0.
The nke calibration wizard uses the raw data.
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