Simrad GC80/GC85 Expanded Gyro Compass
18 20221529 / C
3.6 Pendulum function
GC80/85 software includes a pendulum function that enables the
heading to be changed by 180°.
The heading change is activated by closing a potential free
contact connected between TB1, pin 71 and 72 on the GTERM
board in GC80/85 control unit.
Note! To identify the function, S2-4 on the SCC board has to be set to
ON. Refer DIP switch settings on SCC board, page 91 onwards.
When the switch is activated, the following actions are
performed:
- The compass heading and repeaters start to change
towards the new 180° shifted heading
- An acoustic alarm sounds 5 times
- The dots in the indicator field in the display starts flashing.
These will remain flashing for as long as the pendulum
function is active.
Normal compass operation is resumed by opening the closed
potential free contact. The function is indicated by the same
acoustic alarm, and the flashing dots returns to fixed illuminated
dots.
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