Minimum Descent Altitude/Decision Height Alerting - Garmin G1000 Pilot's Manual

FLIGHT INSTRUMENTS

MINIMUM DESCENT ALTITUDE/DECISION HEIGHT ALERTING

For altitude awareness, a Minimum Descent Altitude (MDA) or Decision Height (DH), based on barometric
altitude, temperature compensated altitude or radar altitude, can be set in the Timer/References Window and is
reset when the power is cycled. When active, the altitude setting is displayed to the bottom left of the Altimeter.
Once the altitude is within the range of the tape, a bug appears at the reference altitude on the Altimeter. The
following visual annunciations occur when approaching the MDA or DH:
• When the aircraft altitude descends to within 2500 feet of the MDA/DH setting, the BARO MIN, RA MIN, or
COMP MIN box appears with the altitude in cyan text (or magenta for TEMP COMP). The bug appears in
cyan (or magenta for TEMP COMP) on the altitude tape at the corresponding altitude once in range.
• When the aircraft passes through 100 feet of the MDA/DH, the bug and text turn white.
• Once the aircraft reaches MDA/DH, the bug and text turn amber and the voice alert, "Minimums. Minimums",
is heard. When the radar altimeter is selected as the altitude source for the Minimum Descent Altitude
alerting function, the color of the current radar height changes to amber.
Barometric
Minimums Bug
Barometric
Minimums Box
Setting the Minimum Descent Altitude/Decision Height and bug:
1) Press the TMR/REF Softkey.
2) Turn the large FMS Knob to highlight the Minimums field.
3) Turn the small FMS Knob to select the desired altitude source: barometric (BARO), temperature compensated
(TEMP COMP), or radar altimeter (RAD ALT). OFF is selected by default. Press the ENT Key or turn the large
FMS Knob to highlight the next field.
4) Use the small FMS Knob to enter the desired altitude for minimums.
5) If using temperature compensated (TEMP COMP). use the small FMS Knob to enter destination air temperature.
5) To remove the window, press the CLR Key or the TMR/REF Softkey.
76
Within 2500 feet
Figure 2-40 Barometric MDA/DH Alerting Visual Annunciations
Garmin G1000 Pilot's Guide for the Diamond DA42NG
Within 100 feet Altitude Reached
190-00962-04 Rev. A