Garmin GPSCOM 190 - Manual (Page 83)

R e f e r e n c e
Vertical
Na\igation
The last option ieatured on the GPSCOM 190’s E6-B
menu is the vertical navigation (VNAV) function, which
lets you create a rate of descent profile from your present
position and altitude to a final altitude at a specified loca­
tion. To use the VNAV feature, your aircraft’s ground
speed must be greater than 35 knots, and you must be
navigating an active GOTO or route.
Vertical Navigation Function
To perform a VNAV calculation:
1. Highlight the 'From' field.
2. Enter the initial altitude and press
3. Enter the final 'To' altitude.
4. Enter the offset (the distance from the waypoint you'll be
referencing for your final altitude) and press
5. Select the 'Before' or 'After' option for the distance off­
set and presses to confirm.
6. Enter the waypoint you want to use as a reference for
your final altitude. If you are navigating an active route,
the waypoint field will offer the active-to waypoint for
the reference waypoint (the waypoint page will appear
for you to confirm).
7. Press to confirm the waypoint The vertical
speed for the descent will appear in the 'AT field.