Garmin GPS 90, Руководство пользователя и справочник

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The last option featured on the GPS 90’s E6-B menu is
the v e rtical navigation (VNAV) function , which lets
you create a rate of descent profile from your pre s e n t
position and altitude to a final altitude at a specified loca-
tion. To use the VNAV feature, your aircraft ground speed
must be greater than 35 knots, and you must be navigat-
ing an active GOTO or route.
To perform a VNAV calculation:
1. Highlight the ‘From’ field and press
E
.
2. Enter the initial altitude and press
E
.
3. Press
E
to begin entry of the final (To) altitude.
4. Enter the desired final altitude and press
E
.
5. Press
E
to begin entry of the offset (the distance from the
waypoint you’ll be referencing for your final altitude).
6. Press
E
and use the arrow keypad to select the ‘Before’
or ‘After’ option for the distance offset.
7. Press
E
to confirm.
8. Press
E
and use the arrow keypad to 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 route waypoints for the reference waypoint.
9. Press
E
to confirm the waypoint. The vertical speed for
the descent will appear in the ‘At’ field.
58
E6-B Menu
VNAV
Entering initial alti-
tude for the VNAV
function.
Selecting a VNAV
waypoint reference.
gps 90 manual 8/6/98 10:01 AM Page 58