OPERATION
20221537 / D 25
3.7 Selecting active compass
If an external heading sensor is connected to GC80/GC85, it is
possible to switch between gyro and external heading sensor as
active steering sensor. The gyro system will normally be used
with the gyro compass selected as active compass. An external
heading sensor should only be used as active compass when the
gyro compass not is working properly.
Active compass may be selected both from compass control
panels and from the dual control panel. The switching may be
done from each panel as shown in the table below:
ACTIVE
COMPASS
FROM OPERATING
PANEL FOR GYRO
NO.1
FROM OPERATING
PANEL FOR GYRO
NO.2
FROM SWITCH
OVER PANEL
Gyro no.1 Yes No Yes
Gyro no.2 No Yes Yes
External
sensor
Yes Yes Yes
dvol
+
^`h
bkq
On the gyro control panels the switching is done by pressing the
GYRO or the EXT and the ACK/ENT buttons simultaneously.
klKN
+
^`h
bkq
On the change over panel, active compass is selected by pressing
the appropriate compass button (
NO.1, NO2 or EXT) and the
ACK/ENT buttons simultaneously.
When the active sensor is changed, an audible alarm will sound
5 times.
Active compass is identified with light in the button’s indicator
lamp, and with active compass labeled with an asterisk in the
Change over panel
WARNING Changing between gyro compass and
external heading sensor may result in large
change of true bearing. No changes should
therefore be made when the system is in
operation.
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