Garmin G1000 Pilot's Manual page 460

APPENDIX B
MAGNETIC FIELD VARIATION DATABASE UPDATE
A copy of the current magnetic field variation database (MV DB) is included with the navigation database.
At startup, the system compares this version of the MV DB with that presently being used by the AHRS
(GRS1). If the system determines the MV DB needs to be updated, a prompt is displayed on the Navigation
Map Page.
Loading the magnetic field variation database update:
1) With 'OK' highlighted, press the ENT Key on the MFD. A progress monitor is displayed.
2) When the upload is complete, the system is ready for use.
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Figure B-20 GRS1 Magnetic Field Variation Database Update Prompt
Figure B-21 Uploading Database to GRS1
Garmin G1000 Pilot's Guide for the Piper PA-32 Saratoga 190-02692-00 Rev. A