Avidyne IFD540, Руководство пилота

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5-14 Navigation
Enable A/P
Approach Displayed for specific autopilots (e.g. KAP140, KFC225)
when the FMS determines it is time for the autopilot to be
in Approach mode but does not have any control or
knowledge of the actual autopilot state. This case is just a
prompt, and no pilot action must be taken on the IFD.
TIPS AND TECHNIQUES
FMS Philosophy
The FMS treats the flight plan as a continuous
sequence of legs, regardless of whether they are
part of a terminal area procedure or are in the
enroute structure. If you had chosen an IAF and the
last waypoint before the approach was the same as
the IAF, then the flight plan would naturally
sequence right into the approach with no further
pilot action required. If the last waypoint before the
approach were not the same as the IAF, then a
discontinuity would precede the approach. The
typical course of action, in that case, is to close the
gap and then, again, the flight plan would sequence
right onto the approach.
The operation with VTF is slightly different,
however. In that case, you really have no choice
but to intervene when it's time to start the approach.
There are several options, including activating the
leg to the FAF, direct-to the leg to the FAF, or the
convenient FMS hook L4 LSK that says "Activate
Approach". That FMS hook is just a shortcut for
activating the leg to the FAF
.