Garmin NavTalk Pilot - Manual (Page 102)

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Section 6
GPS Receiver
Reference
5. With the waypoint distance ‘By’ field highlighted,
press ENTER. Enter an offset distance from the
destination waypoint where the target altitude
should be reached. If the target altitude occurs at
the destination waypoint, enter a distance of zero.
Press ENTER when finished.
6. With the offset direction field (immediately to the
right of ‘By’) highlighted, press ENTER. Select
‘Before’ or ‘After’ and press ENTER. This setting
designates whether the offset distance defines a
point before you reach the destination waypoint or
after you reach the destination waypoint.
7. When using a route, the ‘VNAV Waypoint’ field
allows you to specify which route waypoint will be
used for the vertical navigation profile. By default,
the unit will select the last waypoint in the route. To
select a different waypoint, highlight the ‘VNAV
Waypoint’ field, press ENTER, select the desired
waypoint and press ENTER.
8. The default profile utilizes a 400 foot-per-minute
descent rate. To change the rate, highlight the
‘Profile’ field, press ENTER, enter a new rate and
press ENTER again.
9. To enable/disable all vertical navigation messages,
highlight the ‘Message’ field and press ENTER.
Select ‘On’ or ‘Off’ (as desired) and press ENTER.
With the profile set, the HSI Page will guide you
through the maneuver. Data fields on the HSI Page can
be configured to indicate the time to beginning of
maneuver, glide ratio and vertical speed to target. A
VNAV indicator on the HSI display will guide you along
the proper descent angle. Expect the following to occur
when using the vertical navigation feature:
• As you approach the initial descent point, the time
to vertical navigation ‘Time to VNV’ field indicates
the time to reach the initial descent point.
Once you are within 500 feet
of the target altitude, the
‘Approaching Target Altitude’
message will appear and the
VNAV indicator will be
removed from the HSI display.
Within one minute of the
initial descent point, an
‘Approaching VNAV
Profile’ message will appear.
When using a route,
vertical navigation can
apply to any waypoint
along the route by selecting
it as the ‘VNAV Waypoint’.