Cockpit Reference Guide

190-00763-02 Rev. A
Garmin G1000 Pilot’s Guide for the Piper PA-46 Meridian
83
FLIGHT INSTRUMENTS
SYSTEM
OVERVIEW
FLIGHT
INSTRUMENTS
EICAS
AUDIO PANEL
& CNS
FLIGHT
MANAGEMENT
HAZARD
AVOIDANCE
AFCS
ADDITIONAL
FEATURES
APPENDICES INDEX
MINIMUM DESCENT ALTITUDE/DECISION HEIGHT ALERTING
Foraltitudeawareness,aMinimumDescentAltitude(MDA)orDecisionHeight(DH)basedonbarometric
altitudecanbeset.Whenactive,thealtitudesettingisdisplayedtothelowerleftoftheAltimeterandwitha
bugatthecorrespondingaltitudealongtheAltimeter(oncethealtitudeiswithinthevisiblerangeofthetape).
ThefollowingvisualannunciationsalertthepilotwhenapproachingtheMDA/DH:
•When the aircraft altitude descends to within 2500 feet of the MDA/DH setting, a box labeled ‘BARO
MIN’appearswiththealtitudeinlightbluetext.Thebugappearsinlightblueonthealtitudetapeatthe
corresponding altitude once in range.
•Whentheaircraftpassesthrough100feetoftheMDAorDH,thebugandtextturnwhite.
•Once the aircraft reaches the MDA/DH, the bug and text turn yellow and the aural alert, “Minimums
Minimums”,isgenerated.
Figure 2-39 Barometric MDA/DH Alerting Visual Annunciations
Altitude ReachedWithin 100 feet
MDA/DH
Setting
MDA/DH
Bug
Within 2500 feet
Alertingisinhibitedwhiletheaircraftisonthegroundanduntiltheaircraftreaches150feetabovethesetting
forthealert.IftheaircraftproceedstoclimbafterhavingreachedtheMDA/DH,onceitreaches50feetabove
theMDA/DH,alertingisdisabled.
TheMDA/DHmaybesetfromeitherPFDandissynchronizedonbothPFDs.Thefunctionisresetwhenthe
power is cycled.
Setting the barometric minimum descent altitude and bug:
1) Select 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 select the TMR/REF Softkey.
Figure 2-40 MDA/DH Setting
(Timer/References Window)