Barometric Minimum Descent Altitude Alerting - Garmin G1000 Pilot's Manual

BAROMETRIC MINIMUM DESCENT ALTITUDE ALERTING

For altitude awareness, a barometric minimum descent altitude (MDA, or decision height, DH) can be set in
the Timer/References Window. When active, the MDA is displayed a window labeled 'BARO MIN' to the lower
left of the Altimeter and on the altitude tape with a bug (once the altitude is within the range of the tape). This
altitude can be adjusted in the 'Baro Min' field in the Timer/References Window (Figure 2-40) from zero to
16,000 ft (in 10-ft increments with the small FMS Knob). The MDA is reset any time the power is cycled.
Setting the barometric minimum descent altitude and bug:
1) Press the TMR/REF Softkey.
2) Turn the large FMS Knob to highlight the 'Baro Min' field (Figure 2-40).
3) Use the small FMS Knob to enter the desired altitude and press the ENT Key.
4) In the highlighted ON/OFF field, turn the small FMS Knob clockwise to ON or counterclockwise to OFF.
5) To remove the window, press the CLR Key or the TMR/REF Softkey.
The following visual annunciations alert the pilot when approaching the MDA (Figure 2-41):
• When the aircraft altitude descends to within 2500 feet of the MDA setting, the Barometric Minimum Window
appears with the altitude in light blue text. The bug appears on the tape in light blue once in range.
• When the aircraft passes through 100 feet of the MDA, the bug and text turn white.
• Once the aircraft descends past the MDA, the bug and text turn yellow and the aural alert, "Minimums
Minimums", is generated.
Alerting is inhibited while the aircraft is on the ground and until the aircraft reaches 150 ft above the MDA.
If the aircraft proceeds to climb after having reached the MDA, once it reaches 50 ft above the MDA, alerting is
disabled.
Barometric
Minimum Bug
Barometric
Minimum Window
190-00498-01 Rev. A
Figure 2-40 Barometric Minimum Descent Altitude
Within 2500 ft
Figure 2-41 Barometric Minimum Descent Altitude Alerting Visual Annunciations
Garmin G1000 Pilot's Guide for Cessna Nav III
Within 100 ft Altitude Reached
FLIGHT INSTRUMENTS
2-27