Garmin G950 Pilot's Manual page 355

PDA and FLTA visual annunciations and voice alerts can be manually inhibited. Discretion should be used
when inhibiting TAWS-B, and the system should be enabled when appropriate. When TAWS-B is inhibited,
the annunciation 'TAWS INH' is shown on the PFD and MFD (Figure 6-61).
Inhibiting/enabling TAWS-B alerting:
1) Select the TAWS-B Page.
2) Press the INHIBIT Softkey to inhibit or enable TAWS (choice dependent on current state).
Or :
a) Press the MENU Key.
b) Select 'Inhibit TAWS' or 'Enable TAWS' (choice dependent on current state) and press the ENT Key.
If TAWS-B alerts are inhibited when the Final Approach Fix is the active waypoint in a GPS SBAS approach,
a 'LOW ALT' annunciation may appear on the PFD next to the Altimeter if the current aircraft altitude is at
least 164 feet below the prescribed altitude at the Final Approach Fix. See the Flight Instruments Section for
details.
FIVE-HUNDRED VOICE ALERT
The purpose of the "Five-hundred" voice alert is to provide an advisory alert of when the aircraft descends
to within 500 feet above the terrain or runway threshold. When the aircraft is within five nautical miles of an
airport, the "Five Hundred" voice alert is based on the nearest runway threshold elevation. When the aircraft
is more than five nautical miles of the nearest airport, the "Five Hundred" voice alert is based on the height
above terrain (as determined by the GPS altitude and Terrain Database).
There are no display annunciations or pop-up alerts that accompany this voice alert.
NEGATIVE CLIMB RATE AFTER TAKEOFF ALERT (NCR)
The Negative Climb Rate (NCR) After Takeoff alert (also referred to as "Altitude Loss After Takeoff")
provides alerts when the system determines the aircraft is losing altitude (closing upon terrain) after takeoff.
The voice alert "Don't Sink" is given for NCR alerts, accompanied by an annunciation and a pop-up terrain
alert on the display. NCR alerting is only active when departing from an airport and when the following
conditions are met:
• Height above the terrain is less than 700 feet
• Distance from the departure airport is 2 nm or less
• Heading change from the departure heading is less than 110 degrees
Figures 6-62 and 6-63 shows the NCR alerting parameters as defined by TSO-C151b.
190-00870-02 Rev. A
Figure 6-61 TAWS-B Alerting Disabled (TAWS-B
Inhibited) Annunciation
Garmin G950 Pilot's Guide for the Pilatus PC-6
HAZARD AVOIDANCE
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