Parameter Set; Speed Trip Pt (Speed Trip Point); Speed Source; Alc (Automatic Leeway Correction) - ComNav Commander P2 Installation & Operation Manual

ComNav Commander P2 Installation & Operation

Parameter Set

The Commander P2 gives you the ability to store two sets of steering parameters, labelled
"Hi" (high) and "Lo" (low). This allows for best performance under varying vessel speeds
and/or loading conditions.
The autopilot can be set manually to use either the Lo or the Hi settings. There is also a
selection for "Auto". If "Auto" is chosen, the autopilot will automatically switch from Hi to Lo,
or vice-versa, depending on the vessel's speed. For "Auto" to work, the autopilot must be
connected to an NMEA 0183 Navigation System that outputs speed information. The Speed
Trip Point, described below, governs the point at which the switch is made.
When the Commander P2 is in AUTO or NAV mode, it always indicates which steering
parameter set is in effect. This is shown just to the left of the Rudder Angle Indicator, and
consists of a small box shape with either H for Hi or L for Lo in it. If the parameter set is set
to Auto, then the word "AUTO" also appears in the box.

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".

Speed Source

The Commander P2 can obtain information about the vessel's speed from a variety of
sources that provide NMEA 0183 data outputs, at either the NAV1 or NAV2 inputs on
connector J9. This menu item 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 112),
and/or the Navigation data source (see page 121).

ALC (Automatic Leeway Correction)

The P2's ALC feature is turned on or off with this parameter. It is active only in AUTO mode.
See the description of ALC on page 23 for details of what it does.

Thruster Assist

Thruster Gain

These two parameters are only available when the Thrust Type parameter (see page 91) is
not set to "None". Complete instructions are included with the CT7 Thruster Interface.
Document PN 29010074 V3.1
Figure 89 – HI and LO Speed Icons (Left of Rudder Angle Indicator)
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Basic Operations