Vertical Calculator (Vcalc) - Garmin GTN 625 Pilot's Manual

14.1

Vertical Calculator (VCAlC)

The Vertical Calculator (VCALC) function allows you to create a three-
dimensional profile which guides you from your present position and altitude to
a final (target) altitude at a specified location. This is helpful when you'd like to
descend to a certain altitude near an airport. Once the profile is defined, message
alerts and additional data can be configured on the Default NAV and Map Pages
to keep you informed of your progress.
VCALC is inhibited in the following conditions:
• Groundspeed is less than 35 knots
• No active flight plan or direct-to destination
• SUSP mode
• Vectors-to-Final mode
• VLOC mode
• After the FAF on an approach
WARNING: Do not use VCALC messages as the only means of either avoiding
terrain/obstacles or following ATC guidance. VCALC provides advisory
information only and must be used in concert with all other available navigation
data sources.
190-01004-03 Rev. B
Cruise Altitude
Target Altitude
Figure 14-3 VCALC Target
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14-3