Simrad AP28 Technical Information download pdf (Page 86)

84 | Setup at installation

1 Speed through water from the speed log source

2 Speed Over Ground (SOG) from the GPS/chart

plotter

See also page 13.

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.

The automatic tuning process is also verifying/adjusting

the “Rudder zero” alignment made in Dockside setup.

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.

Recommended speed during Automatic tuning

should not

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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Simrad AP28 Technical Information Page 86