Automatic Mode Switching - BENDIXKing AeroNav 910 Pilot's Manual

TIPS AND TECHNIQUES
Discontinuities During Approaches
Before you insert an approach at an airport, the FMS
is being told to fly a leg directly to the airport (i.e. the
reference point) and the legs on the map reflect that.
However, when you insert an approach, the FMS is
being told to fly the legs of the approach to the
airport (actually to the runway) and not fly a leg to
the airport reference point. After the approach has
been entered, you'll notice a "discontinuity" before
the first leg of the approach. A discontinuity is an
indication that the FMS doesn't know how to get
from the leg before the discontinuity to the leg after.
In other words, there's a gap in the flight plan. The
gap can be closed via a number of means to include
using the L4 LSK hook, activating a leg of the
approach, or Direct-To the leg to the FAF. Verify the
system will do as you expect by examining the
depiction on the map.
AUTOMATIC MODE SWITCHING †
Automatic mode switching to VLOC (e.g. GPSVLOC transition)
including automatically setting the inbound course, will occur if
the capture criteria defined above are met and the primary nav
frequency can be auto-identified. If auto tuning has not been
enabled on the setup pages, or a station cannot be identified,
automatic mode switching will not occur.
89000039-010
Rev 1 May 2019
AeroNav 900/880 Series Pilot's Guide
Navigation 6-25