Garmin G1000 King Air C90GT - Manual (Page 97)

190-00663-01 Rev. A Garmin G1000 Pilot’s Guide for the Hawker Beechcraft C90A/GT 83
FLIGHT INSTRUMENTS
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ANEL
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HAZARD
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ANCE
AFCS
ADDITIONAL
FEA
TURES
APPENDICES
INDEX
LOW ALTITUDE ANNUNCIATION
NOTE: The Low Altitude Annunciation is available only for aircraft with GIA 63W Integrated Avionics Units
when WAAS is available. This annunciation is not shown unless TAWS is inhibited.
When the Final Approach Fix (FAF) is the active waypoint in a GPS WAAS approach using vertical guidance,
a Low Altitude Annunciation may appear if the current aircraft altitude is at least 164 feet below the prescribed
altitude at the FAF. A black-on-yellow ‘LOW ALT’ annunciation appears to the top right of the Altimeter,
flashing for several seconds then remaining displayed until the condition is resolved.
Figure 2-47 Low Altitude on GPS WAAS Approach
Altimeter
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 2-48 Barometric MDA/DH Alerting Visual Annunciations
Altitude Reached Within 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.