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Simrad GC80/85 Compact MK2 Gyro Compass
Note!
988-12718-003
Adjusting True heading
After the GC80/85 is settled, the Gyro compass has to be calibrated against
an external reference, e.g.:
- a known target
- astronomical observation
- the heading of the pier or quay the vessel is moored to
- fixed points on the chart that the vessel is sailing between
The observation period for the heading difference should be as long as
possible.
If there is any difference between the Gyro bearing and the confirmed
external reference that cannot be corrected by adjusting the mechanical
location of the Master compass, an offset value may be inserted in the
GC80. This value is entered by using the Extension menu as follows:
1
Activate the Extension menu by pressing and holding the SET
button and the ACK/ENT button simultaneously for at least 3
seconds.
Main category A-1 will be displayed
-
2
Press the DISP button once to display main category A-2.
3
Press the SET button to enter the sub-category 2.1.o.
4
Use the ARROW buttons to increase or decrease the offset
parameter value.
To correct for +1.5°, press the ARROW UP button until the display shows
1.5°.
To correct for -1.5°, press the ARROW DOWN button until the display
shows 358.5°!
5
Confirm the new value by pressing the ACK/ENT button, or reject
the changes by pressing the SET button. The display will return to
sub-category 2.1.o.
6
Exit the Extension menu by pressing and holding the SET and
ACK/ENT buttons simultaneously for at least 3 seconds.
For further information about the Extension menu, refer
Extension menu
from page 68 onwards.
Using the
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