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1. HOW TO INSTALL THE EQUIPMENT
9
1.3 Compensation of Deviation
The unit’s magnetic sense of direction may be affected by the metal of the vessel (including en-
gines and power cables) as well as metal machinery or equipment on board. This discrepancy be-
tween true magnetic north and the indication of the unit is called “deviation”. Deviation may cause
incorrect heading data. The unit has the ability to automatically correct the deviation.
Note: In order to ensure the correct output orientation to a connected device, be sure to correct
the deviation.
After finishing the installation completely, do the compensation of deviation in calm sea conditions
as follows:
1. Turn the PG-700 on and verify that the STATUS lamp is not lit red.
2. Press and hold the [+] and [-] key together for 3 seconds, and release both keys.
Deviation correction starts. The CALIB lamp flashes, and the STATUS and CHECK lamps
turn off.
3. Turn the ship in as accurate a circle as possible, at a constant speed.
Steer in a controlled circle at approx. three knots, for about two minutes. It does not matter if
you turn in a left or right direction.
Note 1: Turning too fast may cause a large bearing error after the deviation correction.
Note 2: Be sure not to turn off the power to the switchboard when fixing deviation. Damage
of data may occur.
4. Continue turning until deviation correction is completed (about 3 to 5 turns).
When deviation correction is successful, the CALIB and STATUS lamps light for five seconds
and the initialization of the angular velocity sensor starts. After all lamps light, go to step 6.
CAUTION
Before doing the compensation of
deviation, turn off the autopilot.
The rudder may jerk violently if the
autopilot is powered, creating a
dangerous condition.
: Flashing (green)
CALIB STATUS CHECK
: OFF
Run circle in two minutes
at speed of appox. three knots.
17


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