190-00870-02 Rev. A
Garmin G950 Pilot’s Guide for the Pilatus PC-6
77
FLIGHT INSTRUMENTS
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL
FEA
TURES
APPENDICES
INDEX
LOW ALTITUDE ANNUNCIATION
NOTE:
A Low Altitude Annunciation is available only when SBAS is available. If either the optional Terrain-
SVS or TAWS-B systems are installed, this annunciation is not applicable unless the installed terrain system
is inhibited, has failed, or is unavailable.
When the Final Approach Fix (FAF) is the active waypoint in a RNAV GPS 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 left of the Altimeter, flashes
for several seconds, then remains displayed until the condition is resolved.
Figure 2-40 Low Altitude on GPS SBAS Approach
Altimeter
LOW ALT
Annunciation
MINIMUM DESCENT ALTITUDE/DECISION HEIGHT ALERTING
For altitude awareness, a barometric Minimum Descent Altitude (MDA) or Decision Height (DH) can be set
in the References Window.
If desired, the system can also compensate this altitude based on a pilot-supplied temperature at the
destination. For example, if the pilot enters a destination temperature of -40
º
C, the system increases the
displayed MDA/DH accordingly.
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, a box labeled ‘BARO MIN’
or ‘COMP MIN’ (based on the selected altitude source) 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 become white.
• Once the aircraft reaches MDA/DH, the bug and text become yellow and the voice alert, “Minimums.
Minimums”, is heard.