ComNav 2001 - Page 39

ComNav 2001 Autopilot System
P/N 29010017 V1.0 - 39-
MEMBRANE KEYPAD
The control keys are used by pressing one of the
RUDDER, COUNTER RUDDER, YAW, or
TURN RATE keys. All four settings will appear
on the display in corresponding positions. The
setting of the control key that was pressed will be
blinking. It may be changed in single steps by
pressing and releasing either the INCREASE or
DECREASE key. The operation of the
CONTROL keys are as follows:
Controls the amount of rudder applied for a given
amount of course error. At the maximum setting
of '9', 3 degrees of rudder will be applied for each
degree of course error. Every two position
reduction in the setting cuts the amount of
correction applied in half. Setting the control to '0'
turns the rudder control off.
Controls the amount of rudder applied for a given
rate of change of course error. If the course error
is increasing, the counter rudder adds to the
rudder correction applied, and if the course error
is decreasing, the counter rudder subtracts from
the rudder correction applied.
At the maximum setting of '9', 10 degrees of
rudder will be applied for a 1 degree per second
rate of change of course error. Every two position
reduction in the setting cuts the amount of
correction applied in half. Setting the control to '0'
turns the counter rudder control off.
Controls the amount of deviation from the
programmed course the autopilot will allow
before correcting the vessel's heading. Increasing
the setting will increase the amount of heading
deviation allowed. The number shown on the
display is the number of degrees of heading
deviation allowed, centred on the programmed
course (ie. a setting of 4 will allow 2 degree's of
heading deviation on either side of the
programmed course, before any correction is
applied).
Controls the rate at which the vessel makes a
course change, returns to its original course after
a dodge, or changes course under Nav. Device
control. The turn rate corresponding to each
control setting is shown below:
Table IV - TURN RATE CHART
TURN RATE SETTING
COURSE CHANGE RATE
DEGREES PER SECOND
0
0.50
1
0.56
2
0.63
3
0.71
4
0.83
5
1.00
6
1.25
7
1.67
8
2.50
9
5.00
RUDDER
COUNTER RUDDER
YAW
TURN RATE