Garmin G1000H Pilot's Manual page 73

HEADING PRESET MODE
Heading Preset Mode allows AHRS to compute heading data without using the magnetic sensing device. If
a magnet anomaly occurs (either due to interference or magnetometer failure), and Heading Preset Mode is
available, an alert will be provided in the alerts window. The heading refence for this mode is a pilot-entered
value.
Activating Heading Preset Mode:
1) Select the PFD Softkey.
2) Select the SET HDG Softkey.
To change the heading value, press the HDG+ or HDG- Softkey until reaching the desired value, or turn the
HDG knob until the Selected Heading Bug reaches the desired value, and then push the HDG SYNC Softkey.
While Heading Preset Mode is active, "SET" is annunciated within the heading indicator field. The heading
numeric values are displayed in light blue, indicating that the value may be modified by the pilot.
Heading Preset Mode will stay active for eight minutes, however, the eight-minute time period is "reset" if
the heading value is changed within two minutes of activating the mode. The heading value can be changed
at any time while Heading Preset Mode is active, but the eight-minute duration is only "reset" by heading
value changes made during the first two minutes that the mode is active.
Heading Preset Mode may be deactivated at any time by pushing the HPM OFF Softkey, or the mode will
automatically deactivate at the completion of the eight-minute time period. If the difference between the
current heading and the magnetic heading is less than ten degrees, the heading indicator will immediately
turn to the magnetic heading, the "SET" annunciation will be removed, and the numeric heading will turn
from light blue to white. If the difference between current heading is greater than ten degrees, the "SET"
annunciation will change to "ALN" (Figure 2-24), and the numeric heading display will turn yellow, indicating
that it is not reliable. The heading indication will transition to the magnetic heading, at which time the "ALN"
annunciation will be removed and the numeric value will change from yellow to white.
190-01255-00 Rev. A
"SET"
Annunciation
Figure 2-23 Heading Preset Mode
"ALN"
Annunciation
Figure 2-24 Heading Alignment
Garmin G1000H Pilot's Guide for the Bell 407GX
™
Heading Preset
Mode Softkeys
FLIGHT INSTRUMENTS
61