Installation
20220596G 93
Figure 4-28). If this gives a better result keep the screen
connected.
Proceed to next menu item by pressing STBD [>] button.
Transition Speed
Transition
speed 00kn
The transition speed is the speed where the autopilot will
automatically change the steering parameter set from HI speed to
LO speed parameters, or vice versa.
The default setting of transition speed is zero, which requires that
steering parameter selection be done manually. If a GPS, Loran,
or external speed log input from the instrument system is
connected the transition speed must be set to a value greater than
0, to enable the automatic speed selection feature in the autopilot.
It is recommended that you set the transition speed to a speed
that represents the speed where the hull begins to plane, or where
you would manually change the parameters from HI to LO.
The speed used for the automatic transition is obtained as
follows:
1. Data from the source set for the INSTR channel in the
interface setup. If this is a valid source of VHW (speed
through the water) data, then this data is used to change the
HI-LO parameter sets.
2. If VHW data is not available from the INSTR channel or if the
INSTR channel is not selected as source, the autopilot will use
the speed data obtained from the VTG (speed over ground)
sentence received from the currently selected POS source.
If no speed data is available, manual speed selection is required.
The autopilot will always default to the HI speed steering
parameters when the system is first turned on, or if there is a
speed data failure.
If manual speed selection is used, the manual setting will
override the automatic until the AUTO mode is re-selected.
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