190-00498-07 Rev. A
Garmin G1000 Pilot’s Guide for Cessna Nav III
77
FLIGHT INSTRUMENTS
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS EIS AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE AFCS ADDITIONAL
FEATURES APPENDICES INDEX
MINIMUM DESCENT ALTITUDE/DECISION HEIGHT ALERTING
Foraltitudeawareness,abarometricMinimumDescentAltitude(MDA)orDecisionHeight (DH)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/DH:
•Whentheaircraftaltitudedescendstowithin2500feetoftheMDA/DHsetting,theBAROMINboxappears
with the altitude in light blue text. The bug appears on the altitude tape in light blue 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yellowandtheauralalert,“Minimums.Minimums”,
is heard.
Figure 2-38 Barometric MDA/DH Alerting Visual Annunciations
Barometric
Minimum
Box
MDA/DH
Bug
Light Blue Within 2500 ft Yellow When Altitude ReachedWhite Within 100 ft
Setting the barometric 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 BARO. 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 from zero to 16,000 feet.
5) To remove the window, press the
CLR
Key or the
TMR/REF
Softkey.
Figure 2-39 MDA/DH Setting
(Timer/References Window)
Alertingis inhibited while the aircraft is on the groundand until the aircraft reaches 150 feet above the
MDA/DH.IftheaircraftproceedstoclimbafterhavingreachedtheMDA/DH,onceitreaches50feetabovethe
MDA/DH,alertingisdisabled.