Garmin GPS 89 User Manual download pdf (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

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

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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Garmin GPS 89 User Manual Page 47

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