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System Operation
3-74
GNS-XL Flight Management System
Rev. 0
Oct/96
b. Enter a (+), then the range value to indicate the off
set is beyond the waypoint.
c. To erase the offset value, INSERT 0 and press ENT Key.
The field changes to dashes, indicating no offset is
programmed.
7. ENT Key - DEPRESS. The cursor moves to the FPA field only if
the entered constraint is below the aircraft’s present altitude.
NOTE: A climb FPA cannot be programmed but the direct FPA field
will display the up angle between the aircraft’s present altitude and
the altitude constraint that was entered. If an FPA is programmed to
a direct FPA up waypoint it will be a DN (descent) FPA and an ambi-
guity will be displayed on the VNAV waypoint page.
To program a Path Descent
8. Flight Path Angle (FPA) -
INSERT or VERIFY (valid
range is 0.1 to 6.0).
(Figure 3-124)
NOTE: The FPA value field
prefills with the default (DEF)
value programmed on the
VNAV DATA Page if this
waypoint was accessed from
the FPL Page. If accessed
from the NAV or
d
Page,
the FPA field prefills with the
(DIR) value. If an FPA is manually entered, the FPA type field
changes to (MAN).
With the cursor over the FPA value, Depressing the BACK Key will
cycle through all or some of the following:
• (DEF)
• (DB)
• (AUTO)
• (DIR)
• (MAN)
To cancel the FPA, INSERT 0 and press ENT Key. The field
changes to dashes, indicating no FPA is programmed, the vertical
deviation output is invalid and no vertical deviation information will be
displayed on the CDU or the ADI/HSI.
WAYPOINT MENLO
ALT 3000
EST CROSSING 2900
OFFSET ---
REQ FPM -----
FPA (DEF) DN 3.0
DIRECT FPA DN 0.0
VNAV WAYPOINT 1/1
>
>
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Figure 3-124