Garmin G1000 Pilot’s Guide for the Socata TBM 850/900
190-00709-05 Rev. D
84
FLIGHT INSTRUMENTS
ALTITUDE ALERTING
The Altitude Alerting function provides visual alerts when approaching the Selected Altitude, and visual and
audio alerts when deviating from the selected altitude. Whenever the Selected Altitude on the PFD is changed,
Altitude Alerting is reset. Altitude Alerting is independent of the AFCS.
The following occur when approaching the Selected Altitude:
• Upon passing through 1000 feet of the Selected Altitude, the Selected Altitude Box changes to black text on
a cyan background and flashes for five seconds.
• When the aircraft passes within 200 feet of the Selected Altitude, the Selected Altitude changes to cyan text
on a black background and flashes for five seconds.
• After reaching the Selected Altitude, if the aircraft flies outside the deviation band (±200 feet of the Selected
Altitude), the Selected Altitude Box changes to yellow text on a black background, flashes for five seconds,
and an aural tone is generated.
Figure 2-42 Altitude Alerting Visual Annunciations
Within 1000 feet
Within 200 feet
Deviation of ±200 feet
LOW ALTITUDE ANNUNCIATION
NOTE:
The Low Altitude Annunciation requires SBAS. Terrain alerts from Terrain-SVS or TAWS-B systems will
appear instead of the Low Altitude Annunciation when these systems are operating and not inhibited.
When the Final Approach Fix (FAF) is the active waypoint in a GPS SBAS approach using vertical guidance,
a Low Altitude Annunciation may appear if the current aircraft altitude is at least 164 feet below the prescribed
altitude at the FAF. A black-on-yellow LOW ALT annunciation appears to the top right of the Altimeter, flashing
for several seconds then remaining displayed until the condition is resolved.
Figure 2-43 Low Altitude on GPS SBAS Approach
Altimeter
LOW ALT
Annunciation
