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G-PILOT 3100 Installation Manual
NAVMAN
27
Note
To exit the calibration at any time, press ESC.
If the boat is not turned as prompted or the compass is not working then calibration can not be completed,
the G-PILOT displays CALB FAIL. Press ESC, fi x the problem and repeat the calibration.
Local disturbances in magnetic fi eld may affect the compass. Calibration must be preformed away
from large metal structures such as marinas, large ships etc.; this is the responsibility of the user.
Ensure that both sources are referencing the same north (true or magnetic). If your magnetic
compass has not been calibrated then you can use another source for heading. If using vessel’s
compass then ensure that the deviation tables are applied to check the autopilot’s compass.
5-1 Calibrating the compass
5 Sea trials
Perform the sea trials:
After performing the dockside setup (see
section 4).
To check the operation of the G-PILOT 3100.
ENT
ENT
Turn G-PILOT 3100 on (See G-PILOT 3100
Operation Manual). Use the manual helm to
sail a straight course at a slow speed.
Go to CSU CAL in the DEVICES menu
(See G-PILOT 3100 Operation Manual).
Use the manual
helm to make 2.5
turns, steady turn to
port or starboard.
Turns should be
smooth and con-
tinuous in one direction.
Each rotation should take approximately
1 to 2 minutes to perform. The G-PILOT
detects when the boat has performed 2.5
rotations and automatically goes to the
Turn the manual helm to several headings,
checking that the displayed heading is close
to the actual heading.
To cancel the calibration, press ESC.
Use the manual helm to sail a straight
course and ensure the boat heading does
not change during this step.
For example,
actual heading
is 20° and dis-
played heading
is 23°.
Press < or > to set the displayed heading
to the actual heading (20° in this example).
This step aligns the compass. If the
G-PILOT is connected to a GPS then press
MENU twice to skip this step and accept
the calibration. Then align the compass to
the GPS (see section 6-1-2).
Use an accurate compass or external GPS
to fi nd the actual boat heading. If using an
external GPS, sail as fast as convenient to
ensure the heading is accurate.
CSU CAL
TURN BOAT
< ALIGN >
< ALIGN >
ACPT CAL
CALB DONE
For the sea trials, sail in an open area where
there are no other craft or obstructions. The
sea should be calm, the wind speed as low as
possible and there should be no currents.
The compass is calibrated.
ENT
End of calibration.