Garmin GPS 89 - Manual (Page 47)

VNAV (coMliniicd)
To acdratc ihe VNAV finctioiiT
1. Review Die calculated vertical speed. Iftiw calculated
speed does notfit wthinttie peiiforniance guidelines of
your aircraft, manually enter the appropriate speed in the
'Af field and press A.
2. Highlight the 'Vnav' held and press A.
3. Use the arrow keypad to select the 'On' seth'ng.
Press
A.
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 Held will display a
‘Navigating’ status.
While the VNAV funaion is active, the vertical naviga­
tion page will provide a continuous display of the recom­
mended 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 fmal altitude, you’ll be informed with a ‘Final Altitude
Alert’ message. The recommended altitude during any active
VNAV maneuver is also displayed at the bottom rig^t of the
Navigation Page.
The VNAV function will be cancelled automatically if the
active route or GOTO is changed in any way (e.g., perform­
ing 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 waypoiiU that has already been past is
selected, the status line will dbplay 'Invalid Profile’, If there
is no aaive GOTO or route, the status field will display ‘No
Active Waypoint’.
MERTICflL HflU
From: 5095^
To:
3500^T
By; 3.0B.
Befor*
Wpt KMKC
fit 17 fpM
Vftov: On
Hoyigating
Once tU VNAV function
fus iwti initiated, a
‘Navi^ting' status Mill
appear at Ox betton of tfie
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