ComNav Commander P2 & P2VS Installation & Operation Basic Operations
Document PN 29010074 V4.1 - 127 -
Speed Trip Pt (Speed Trip Point)
The Speed Trip Point governs the point at which the autopilot automatically transitions from
the Lo steering parameters to Hi. For automatic transition to take place, the Parameter Set
must be set to “Auto”.
The value can be set from 2 to 20; the units (Knots, Km/h, etc.) are what the
Speed Source
is providing.
Note: this parameter is also used to control the SPEED MODE status output (see
Speed Mode & Timing Outputs on page 78).
Speed Source
The Commander P2 can obtain information about the boat’s speed from a variety of sources
which provide NMEA 0183 data, at either the
NAV1
or
NAV2
inputs on connector
J9
.
This menu line is used to select which of the two inputs the autopilot will use.
•
The selected input can be the same one used for the Compass Source (see page
117), and/or the Navigation data source (see page 138).
A source of Speed data is strongly recommended on P2VS systems being
used without an RFU, in order to give the Virtual Rudder Feedback
algorithms a way to gauge the rudder’s effectiveness.
If you do not have a Speed Source, then you should always set the Parameter
Set to “Hi”.
ALC (Automatic Leeway Correction)
The autopilot’s ALC feature is turned on or off with this parameter. See the description on
page 23 for details of what it does. It can be turned on only in
AUTO
mode.
When it is active, the letters “ALC” are shown, to the right of the `A´ mode indicator.
Figure 83 – Typical AUTO Mode Screen
Thruster Assist
Thruster Gain
These two parameters are only available when the Thrust Type parameter (see page 88) is
not set to “None”. Complete instructions on how to configure the autopilot’s Thruster
parameters, and on how to use it, are included with the CT7 Thruster Interface.
A “propeller” icon is shown to the left of the Commanded Heading when a thruster is present
(see the figure above).
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