System information

78 | Setup at installation
Ground. This adjustment should be made in calm sea
with as little wind or tidal current as possible.
1 Bring the boat up to a constant cruising speed
(above 5 knots)
2 Select Calibrate w/SOG and press the MENU key
3 Press the MENU key again to confirm and execute
the calibration
4 The SPD Correction factor will now be changed to
equal the SOG and SPD values
Manually adjust the speed value
If you experience an incorrect speed reading, this can be
manually re-adjusted by running the boat at constant
speed over a known distance in both directions and
average the speed reading. This reduces the effect of
wind and tidal current.
Then adjust the SPD Correction factor to get the correct
speed reading.
Range Change per step Default
0.50 – 1.50 0.01 1.00
Transition HI-LO
The Transition HI-LO is the speed at which the AP24 will
automatically change the steering parameter set from HI
to LO parameters, or vice versa (page
13).
The default setting of the Transition speed is 6 knots.
On power boats it is recommended that you set the
Transition HI-LO to a speed that represents the speed
where the hull begins to plane or the speed where you
change from slow to cruising speed.
On sailboats the Transition speed should be set to 3-4
knots to give the best response in a tack.
The speed used for the automatic transition is obtained
with the following priority:
1 Speed through water from the speed log source.