Garmin GTN 625 Pilot's Manual Upgrade Supplement page 20

The altitude restriction from the database displays when the following three
conditions are present.
1. A pilot-specified altitude constraint is deleted
2. Navigation database contains an altitude restriction for the lateral
waypoint
3. A predicted altitude is not available
Once added to the flight plan, an altitude constraint may be modified or
deleted using the controls in the VNAV Options menu. Select a value in the ALT
column to display available options.
Selection
• Opens a list of available constraint types
Type
• Options: At, At or Above, At or Below, and Between
• Opens a keypad. Specify an altitude value for the selected
Altitude
Data Entry
• Unit options: MSL, AGL, and Flight Level
• Returns a modified altitude constraint to its original published
Revert
Constraint
• Removes the VNAV designation from the altitude
• Value remains displayed for reference purposes. It is no longer
Remove
Constraint
• Removing the VNAV designation from an altitude may
190-01004-03 Rev. N
constraint type
value
used to compute vertical guidance
invalidate other displayed altitudes or cause them to change
after recalculation
Table 4-2 Altitude Constraint Options
GTN 625/635/650 Pilot's Guide
Function
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
4-29