System Operation
3-71
GNS-XLS Flight Management System
Rev. 3
Sep/96
VERTICAL NAVIGATION (VNAV) OPERATION - PRE-
DEPARTURE
SETTING CRUISE ALTITUDE, TRANSITION LEVEL, AND
DEFAULT FLIGHT PATH ANGLE
This procedure allows the pilot to define a Cruise Altitude and change
the default values for Transition Level and Flight Path Angle.
After Initial Leg Selection:
1. VNAV Key - DEPRESS to display VNAV Page 1.
2. Line Select Key -
DEPRESS to position
cursor over DATA?.
(Figure 3-119)
3. ENTER Key - DE-
PRESS to display VNAV
DATA Page with cursor
over the CRUISE ALT
field.
4. Cruise Altitude - INSERT.
(Figure 3-120)
Only two or three digits
are required to input an
altitude, i.e. enter 80 and
8000 is displayed, enter
120 and 12000 is dis-
played.
Any altitude value
entered greater than the
TRANS LEVEL, altitude
value which normally
defaults to FL180, is
converted and displayed as flight level (FL). Entering 210 will
display FL210.
An altitude less than 1000 feet must be entered with a preceding
zero, i.e., enter 052 and 52 is displayed.
DESCENT 875
TO KSFO 11
EST CROSSING 875
REQUIRED FPM ----
ACTUAL FPM 0
DATA?
VNAV 1/4
>
>
>
Figure 3-119
CRUISE ALT FL210
TRANS LEVEL FL180
DEFAULT FPA 3.0
PRESEL ALT FL210
RANGE (NM) -----
ETE -----
VNAV DATA 1/1
>
>
>
Figure 3-120
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