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Activating the GC80 or GC85 Control unit ............................................................. 49
Activating an external heading sensor .................................................................... 51
HDT/THS ............................................................................................................................. 54
Activating the pendulum function ........................................................................... 55
6.6
Installing the Sensitive elements ........................................................................................ 58
Verifying the element's tilt angle ............................................................................... 60
6.7
System start-up and software configuration .................................................................. 62
System Start-up for each Gyro compass ................................................................. 62
6.8
Balancing the Horizontal ring .............................................................................................. 66
Adjusting True heading ................................................................................................ 66
6.9
Configuring the Dual function ............................................................................................. 67
Setting the heading difference alarm ...................................................................... 68
7
ADVANCED SETTINGS ................................................................................................ 70
7.1
General ......................................................................................................................................... 71
7.2
Using the Extension menu .................................................................................................... 71
7.3
The Extension menu overview ............................................................................................. 72
8
TECHNICAL SPECIFICATIONS ..................................................................................... 78
8.1
Accuracy ....................................................................................................................................... 79
8.2
General specifications ............................................................................................................. 79
8.3
Input specifications .................................................................................................................. 80
8.4
Output specifications .............................................................................................................. 82
8.5
Physical Dimensions ................................................................................................................ 84
GC80/85 Master compass ............................................................................................. 84
GC80/85 Dual MK2 Control unit ................................................................................. 84
8.6
Power ............................................................................................................................................ 84
GC80/85 Master compass ............................................................................................. 84
GC80/85 Dual MK2 Control unit ................................................................................. 84
8.7
Environmental Specifications ............................................................................................... 85
GC80/85 Master compass ............................................................................................. 85
GC80/85 Dual MK2 Control unit ................................................................................. 85
9
DRAWINGS .................................................................................................................. 87
9.1
Drawings included ................................................................................................................... 88
10
SPARE PART LIST ........................................................................................................ 96
10.1
GC80 Dual Gyro system .......................................................................................................... 97
988-12720-002
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