Garmin GDU 370 Installation Manual page 100

7. Ensure that the aircraft has been properly positioned per the on-screen instructions.
8. Use the FMS Joystick to highlight the Calibrate button at the bottom of the display, press the
ENT Key to begin the calibration.
9. The PFD advises the operator when to turn the aircraft, when to stop, and when to turn again.
10. Upon instruction to turn, taxi the aircraft in a right turn. After approximately 30° of turn
from the last heading the PFD instructs the operator to stop the aircraft.
Due to the difficulties in executing smooth, accurate turns the PFD may incorrectly
interpret a station and instruct to "HOLD POSITION" prior to full completion of a 30°
turn. If this scenario is encountered, it is best for the operator to ignore the "HOLD
POSITION" command and instead use outside references to complete the approximate
30° of turn. Instead of using the PFD instruction to turn as a real-time indication of when
to turn, simply judge the 30° (±5°) turn increments of the aircraft by using the compass
rose radials. Dwelling at these 30° increments for the time recommended by the PFD
should result in successful calibration.
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Revision A
NOTE
G3X Installation Manual – Post Installation Checkout and Calibration Procedures
190-01115-01