Navigation Modes; Selecting The Leg Mode Or The Obs Mode; The Leg Mode - Honeywell BENDIX/KING KLN 94 Pilot's Manual

Chapter 5 Intermediate Operation
5.5.

NAVIGATION MODES

The KLN 94 allows you to choose how the course to the active waypoint is
defined. This is done by selecting between the two course modes, LEG
and OBS. The LEG mode means that the course to the active waypoint is
selected by the KLN 94, and is the default mode when the KLN 94 starts
up. The other course mode, OBS, is the mode that allows you to select
the course to or from the active waypoint. In this mode, the KLN 94 oper-
ates very much like a VOR receiver. This is the mode that you will use
quite often if you conduct non-precision approaches with a course rever-
sal (procedure turn or holding pattern) using the KLN 94.
The KLN 94 also has three modes
that are associated with approach
operations. These are En route,
Approach Arm and Approach Active.
These modes will be explained in
Chapter 6.
The course mode is annunciated in
the bottom right corner of the screen.
When in the Leg mode, it displays
LEG (figure 5-41), and when in the
OBS mode, it displays OBS (figure
5-42).
5.5.1.

SELECTING THE LEG MODE OR THE OBS MODE

To change course modes:
1. Press the H button.
2. If the KLN 94 was previously in the Leg mode, it will now be in the
OBS mode, and vice versa.
5.5.2.

THE LEG MODE

The following are the characteristics of the Leg Mode:
1. The default course deviation indicator (CDI) sensitivity for en route
mode is plus and minus five nautical miles, full scale. This applies to
the CDI on the NAV 1 page as well as any external CDIs or HSIs
interfaced to the KLN 94. If the CDI or HSI has five dots left and right
of the center position, then each dot represents one nautical mile of
deviation.
2. Navigation is provided along the great circle path between two way-
points. As you probably know, great circle navigation is the shortest
Figure 5-41
Figure 5-42
5-14