Garmin GTN 650 Cockpit Reference Guide - Page 31

Vertical Calculator Vcalc Profile

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VERTICAL CALCULATOR (VCALC) PROFILE 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 2500 feet MSL 4 NM before KRNO. Since the vertical speed is set to 400 feet per minute, the descent needs to begin in 4 minutes and 51 seconds. At the present location, a vertical speed rate of -21 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 select Before or After waypoint. Touch to select altitude type, MSL or Above Touch to enter WPT. vertical speed Touch to enter distance offset from target waypoint Touch to select Status of Profile Vertical Speed Required waypoint. VCALC Page NOTE: The Altitude Type key will not be available when the VCALC target waypoint does not have valid altitude data. Touch to reset the target altitude, altitude type, VS profile, and offset fields. VCALC Profile Menu Options Touch to show messages related to the VCALC profile on the message page. 190-01004-04 Rev. C GTN 625/635/650 Cockpit Reference Guide (CRG) 25 Utilities

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25
190-01004-04
Rev. C
GTN 625/635/650 Cockpit Reference Guide (CRG)
Utilities
VERTICAL CALCULATOR (VCALC) PROFILE
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 2500 feet MSL 4
NM before KRNO.
Since the vertical speed is set to 400 feet per minute, the
descent needs to begin in 4 minutes and 51 seconds. At the present location, a
vertical speed rate of -21 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 select
altitude type,
MSL or Above
WPT.
Touch to
select Before
or After
waypoint.
Touch to enter
vertical speed
Touch to select
waypoint.
Status of Profile
Vertical Speed Required
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.
Touch to reset
the target
altitude, altitude
type, VS profile,
and offset fields.
Touch to show
messages related to
the VCALC profile on
the message page.
VCALC Profile Menu Options