Garmin GTN 750 Cockpit Reference Guide - Page 35

Vertical Calculator Vcalc - system status page

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VERTICAL CALCULATOR (VCALC) The VCALC page uses GPS position, GPS computed altitude, and pilotselected parameters to calculate and display the time to begin descent and vertical speed required to reach a desired altitude above a designated waypoint offset. The screenshot below is a sample profile for an aircraft to be at 2000 feet MSL 4 NM before KPBI. Since the vertical speed is set to 400 feet per minute, the descent needs to begin in 2 minutes and 12 seconds. At the present location, a vertical speed rate of -328 feet per minute is required to reach the target. There are no menu options for the VCALC Profile page. * * Touch to set target altitude. VCALC Key Touch to set target altitude. Touch to enter distance offset from target waypoint. Touch to select Before or After waypoint. Status of Profile VCALC Page Touch to enter vertical speed. Touch to select waypoint. Vertical Speed Required Touch to display VCALC messages in message list. NOTE: The Altitude Type key will not be available when the VCALC target waypoint does not have valid altitude data. 190-01007-04 Rev. B GTN 725/750 Cockpit Reference Guide (CRG) 29 Utilities

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29
190-01007-04
Rev. B
GTN 725/750 Cockpit Reference Guide (CRG)
Utilities
VERTICAL CALCULATOR (VCALC)
The VCALC page uses GPS position, GPS computed altitude, and pilot-
selected parameters to calculate and display the time to begin descent and
vertical speed required to reach a desired altitude above a designated waypoint
offset.
The screenshot below is a sample profile for an aircraft to be at 2000
feet MSL 4 NM before KPBI.
Since the vertical speed is set to 400 feet per
minute, the descent needs to begin in 2 minutes and 12 seconds. At the
present location, a vertical speed rate of -328 feet per minute is required to
reach the target. There are no menu options for the VCALC Profile page.
*
*
VCALC Key
Touch to set
target altitude.
Touch to set
target altitude.
Touch to select
Before or After
waypoint.
Touch
to enter
vertical
speed.
Touch
to select
waypoint.
Status of
Profile
Vertical
Speed
Required
Touch to
display
VCALC
messages in
message list.
Touch to enter
distance offset
from target
waypoint.
VCALC Page
NOTE:
The Altitude Type key will not be available when the VCALC target
waypoint does not have valid altitude data.