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 profi le 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 Profi le 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 Profi le
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 profi le,
and offset fi elds.
Touch to show
messages related to
the VCALC profi le on
the message page.
VCALC Profi le Menu Options
Summary of Contents for GTN 625
Page 55: ......
