90 | Setup at installation
The speed used for the automatic transition is obtained
with the following priority:
1 Speed through water from the speed log source
2 Speed Over Ground (SOG) from the GPS/chart
plotter
See also page
19.
Range Change per step
Default Units
OFF - 30 1 6 knots
Automatic tuning
Autotune is a feature that automatically sets the most
important steering parameters (Rudder and Counter
Rudder) by taking the boat through a number of S-turns.
The scaling factors of the parameters are also set
automatically as a function of the boat type selection
performed in the Dockside menu.
Automatic tuning is a procedure that is not required for
the AP28 to function as it is preset with steering
parameters that should steer most boats in the 30-50
foot range. It is, however, recommended to perform an
automatic turning as part of the seatrial.
Recommended speed during Automatic tuning
exceed 10 knots. It should be performed in calm or
moderate sea conditions, preferably when steering East
or West.
For displacement boats use a speed that is approximately
half the normal cruising speed (i.e. if cruising speed is 10
knots, perform the Autotune at about 5 knots).
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