IFD400 Series Pilot Guide
2-28 FMS Subsystem
Lateral Offset Map Depiction
FLIGHT PLAN DISCONTINUITIES
A discontinuity indicates that the FMS cannot provide guidance to
the leg following the discontinuity. If a discontinuity exists in the
flight plan and the FMS reaches the end of the leg preceding the
discontinuity, the FMS will not sequence the leg and will provide
guidance outbound along the same course until some overt
action is taken to change the active leg. Several kinds of
discontinuities exist, each discussed in the following sections.
Gap In Route
A "Gap In Route" discontinuity is typically caused by the entry of
an approach when the preceding leg does not terminate at the
same waypoint as the first waypoint in the approach. This is
because the FMS does not assume that it is safe to proceed
directly from the last enroute waypoint to the first point on the
approach. If the pilot has confirmed that a direct path is indeed
safe (and desired), then the right course of action is to manually
close the gap. This can be accomplished by moving the cursor to
the gap and pressing CLR or the bottom LSK, which will be
labeled as "Connect" with the two waypoint identifiers. In this
case, closing the gap will insert a direct leg from the last enroute
waypoint to the first approach waypoint.
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