Garmin G1000 Pilot's Manual page 180

MULTI FUNCTION DISPLAY
Excessive Descent Rate Alert (EDR)
The purpose of the Excessive Descent Rate alert is to
provide suitable alerts when the aircraft is determined to
be closing (descending) upon terrain at an excessive speed.
Figure 7-27 displays the correlation between height above
terrain and descent rate, resulting in the two EDR alerts.
EDR alerts have two levels of severity, caution (sink rate)
and warning (pull-up).
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0
2000
Figure 7-27 Excessive Descent Rate
7-44
" P U L L U P " "PULL UP"
4000 6000 8000 10000
Descent Rate (FPM)
Garmin G1000 Pilot's Guide for Cessna Nav III
Negative Climb Rate After Takeoff
Alert (NCR)
The purpose of the Negative Climb Rate After Takeoff
alert is to provide suitable alerts to the pilot when the
system determines that the aircraft is losing altitude
(closing upon terrain) after takeoff. The aural message
"Don't Sink" is given for NCR alerts, accompanied by an
annunciation and a pop-up terrain alert on the display.
NCR is only activated during the departure phase of
flight under the following conditions:
A) height above the terrain is less than 700 feet
B) the aircraft is less than 2 nm from the departure
airport
C) heading change from the departure heading is less
than 110 degrees.
"Five-Hundred" Aural Alert
The purpose of the aural alert message "Five-hundred"
is to provide an advisory alert to the aircrew that the
aircraft is five-hundred feet above terrain. When the
aircraft descends within 500 feet of terrain, the aural
message "Five-hundred" is heard. There are no display
annunciations or pop-up alerts that accompany the aural
message.
12000
This function is enabled when the aircraft' s height
above the terrain is more than 675 feet. It is disabled
when the aircraft' s height above the terrain becomes less
than 500 feet.
190-00498-00 Rev. A