Garmin GNS 400W Pilot's Manual & Reference page 68

2 - NAV PAGES
Vertical Navigation - VNAV
With the profile set, the vertical speed required
(VSR) is displayed on the vertical navigation page.
Expect the following to occur when using the vertical
navigation feature:
• A t one minute prior to reaching the initial descent
point, a message "Approaching VNAV Profile"
occurs. The descent angle will also lock to pre-
vent changes in speed from altering the profile.
• I f selected, the vertical speed required (VSR)
readout on the default NAV and map pages will
show the desired vertical speed to maintain the
proper descent angle. Maximum VSR that can be
displayed is -6000 ft/min. If VSR exceeds -6000
ft/min, dashes will be displayed.
• C ourse reversals are not included in the VNAV
calculations until the aircraft begins the course
reversal. While reversing course, VNAV includes
direct-to the course reversal wayopint in the
VNAV calculation.
• A t 500 feet above the target altitude, an
"Approaching Target Altitude" message is pro-
vided. The VSR readout on the default NAV and
map pages is blanked out, at this point.
Vertical navigation messages can be turned on or
off. (By default the messages are off.) Turning the mes-
sages off allows you to keep the profile settings you've
entered previously, without having them generate mes-
sages when the feature isn't needed.
58
To disable/enable the vertical navigation (VNAV)
messages:
1. Press MENU to display the vertical navigation
page options menu.
2. With "VNAV Messages On?" highlighted, press
ENT. Or, if the messages are already on and you
wish to turn them off, make sure "VNAV Mes-
sages Off?" is highlighted and press ENT.
To restore the factory default VNAV settings:
1. On the Nav VNAV page, press the MENU
key.
Turn the large right knob to highlight
2.
"Restore Defaults" and then press ENT.
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