Garmin GPSCOM 190 - Manual (Page 84)

To activate the VNAV function;
1. Review the calculated vertical speed. If the calculated
speed does not fit within the performance guidelines of
your aircraft, manually enter the appropriate speed in
the 'At' field and press'
Vertical Navigation Function (cont.)
2. Highlight the 'Vnav' field and press
3. Select the 'On' setting and press ^9 ■
The VNAV status at the bottom of the page will
change from ‘Enter Profile’ to ‘Begin In____ indicating
the time remaining to begin the descent. Once you are
less than 15 seconds from the starting point of the
descent, you’ll be informed with a ‘Start Altitude Change’
message.
If the maneuver has already started, the status field
will display a ‘Navigating’ status.
While the VNAV function is active, the vertical navi­
gation page will provide a continuous display of the rec­
ommended altitude you should be at (the ‘From’ field)
and the vertical speed required (the ‘At’ field) to complete
the maneuver.
When the recommended altitude is within 1,000 feet
of the final altitude, you’ll be informed with a ‘Final
Altitude Alert’ message. The recommended altitude dur­
ing any active VNAV maneuver is also displayed at the
bottom right of the Navigation Page.
The VNAV function will be cancelled automatically if
the active route or GOTO is changed in any way (e.g.,
performing an on-route GOTO or adding a waypoint to a
route). Whenever this happens, you’ll be informed with a
‘VNAV Cancelled' message.
If your current speed does not exceed 35 knots, or a
route waypoint that has already been past is selected, the
status line will display ‘Invalid Profile’. If there is no active
GOTO or route, the status field will display ‘No Active
Waypoint’.
R e f e r e n c e
VNAV Fimcííoii
MERTICñL HñM
From: 24?9^
To:
3500fr
By: 3.0R.
Before
W- 3R0
fit:
17fpm
Vncfy: Off
Enter Profile
126.77
WTiile on an active GOTO,
you may create a vertical
decent pro/ile by using the
VNAV/unction.
UERTICñL NftU
From: 3465'‘ t
To: 3500*v
By: 3.0Rs
Before
Wpt: 3R9
fit:
17fm
Vnay: On
Haoigcfting
126.77 иыиа
Once the VNAV junction
has been initiated, a
‘Navigating status will
appear at the bottom of the
page.
M.