Garmin G1000H Marine Radio User Manual


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190-01255-00 Rev. B
Garmin G1000H
™
Pilot’s Guide for the Bell 407GX
75
FLIGHT INSTRUMENTS
MINIMUM DESCENT ALTITUDE/DECISION HEIGHT ALERTING
Foraltitudeawareness,aMinimumDescentAltitude(MDA)orDecisionHeight(DH),basedonbarometric
altitude or radar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orDH:
•Whentheaircraftaltitudedescendstowithin2500feetoftheMDA/DHsetting,aboxlabeledBAROMINor
RAMIN(basedontheselectedaltitudesource)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. 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yellow.
Figure 2-44 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) 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) 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 (from zero to 16,000 feet).
5) To remove the window, press the
CLR
Key or press the
TMR/REF
Softkey.
Figure 2-45 Timer/References Window, MDA/DH Setting
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