Garmin Beechcraft 200 Series Cockpit Reference Manual page 12

Warnings, Cautions & Notes
NOTE: Garmin requests the flight crew report any observed discrepancies
related to database information. These discrepancies could come in the form
of an incorrect procedure; incorrectly identified terrain, obstacles and fixes; or
any other displayed item used for navigation or communication in the air or
on the ground. Go to FlyGarmin.com and select 'Aviation Data Error Report'.
NOTE: When operating the system with the magnetic sensor uncoupled
from the AHRS, the displayed heading and heading information used by
some system components (e.g. traffic system, AFCS, and weather radar) will
be different from the heading calculated by the AHRS. The difference is an
amount equal to the difference between the current Magnetic Field Variation
Database (MV DB) value, and the MV DB value when the magnetic sensor
was uncoupled. Due to the convergence of isogonic lines, this condition is
most noticeable at or near the north and south magnetic poles.
NOTE: System navigation utilities may not reliably calculate range and bearing
information when the aircraft is operating north of 80° North latitude or south
of 80° South latitude. This may result in the system displaying small gaps in
racetrack holding pattern depictions (GRS 7800 installations only).
NOTE: When using Stormscope, there are several atmospheric phenomena in
addition to nearby thunderstorms that can cause isolated discharge points in
the strike display mode. However, clusters of two or more discharge points
in the strike display mode do indicate thunderstorm activity if these points
reappear after the screen has been cleared.
NOTE: System navigation utilities may not reliably calculate range and bearing
information when the aircraft is operating north of 89° North latitude or south
of 89° South latitude. This may result in the system displaying small gaps in
racetrack holding pattern depictions (GRS 7800 installations only).
NOTE: Operate G1000 NXi system power through at least one cycle in a
period of four days of continuous operation to avoid an autonomous system
reboot.
Garmin G1000 NXi Cockpit Reference Guide for the Beechcraft 200/B200 Series 190-02040-01 Rev. B