TM 1-1510-218-10
3C-109
Figure 3C-54. Normal Parallel Offset Positions
If a leg course change is greater than 127, a
course discontinuity is created. Upon reaching the
switch point, the new offset course for the next leg
becomes active. Figure 3C-55 shows examples with
the offset on both the inside and outside of the
required turn.
h. Vertical Navigation.
(1) Vertical Navigation (VNAV) Overview.
The FMS-800 VNAV function provides guidance for a
climb or descent to an assigned altitude at a waypoint
or crossing fix in STAR or initial approach procedure.
It also provides situational awareness for climb and
descent planning and allows fuel-efficient descents
with adjustments for actual wind.
Vertical guidance is not provided during holding
pattern, DME arc, course reversal, intercept, or pattern
execution. Also, it is not provided for vertical path
segments that extend into the previous flight plan leg.
(2) Assigning an Altitude or Flight Level.
VNAV guidance requires an altitude or Flight Level
(FL) to be entered at a waypoint in the flight plan. If an
active flight plan is transferred from the alternate flight
plan, all altitudes assigned at waypoints are also
transferred. When an altitude has been assigned to a
waypoint, it is indicated by a V attribute on the right
side of the Flight Plan page waypoint line. To delete
this altitude assignment, enter a – and press the right
adjacent line select key, or the upper left line select
key if on the Flight Plan Waypoint page.
