Simrad AP20 Autopilot
90
20220505H
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 AP20 system
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 AP20 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.
Rotate the course dial clockwise until the transition speed is set
to the desired value in knots.
Proceed to next menu item by pressing STBD [>] button.
Interface Settings
The AP20 system provides a totally flexible approach to the
input of data from heading sensors and other peripheral
equipment. Identification of the type of equipment connected to
the AP20 system is performed in the Interface Menu.
To be able to display all information on the instrument screens
(paragraph 2.22) refer to the table in paragraph 3.1 for required
NMEA messages.
When your system includes connection of external equipment to
the NMEA0183 data ports in Junction Unit or NI300X, or if the
CI300X is installed with optional compass units or an optional
analogue wind vane unit, they must be configured under the
Interface Menu. This procedure allows you to assign an
abbreviated name to identify the type of equipment that is
connected to each of the available hardware ports in the AP20
system.