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5-32
Rev 1
5.9 MODES OF OPERATION
The KLN 90B 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 90B, and is the default mode
when the KLN 90B starts up. The other course mode,
OBS, is the mode that allows you to define the course to
the active waypoint. This is the mode that you will use
quite often if you conduct any non-precision approaches
using the KLN 90B.
The KLN 90B also has three modes that are associated
with approach operations. These are Enroute, Approach
Arm and Approach Active. These modes will be
explained in chapter 6.
The status of the course modes and the approach
modes are annunciated in the lower center segment of
the screen (figure 5-105). The exceptions to this are on
the Turn-On page where the mode is not annunciated,
and on the Super NAV 5 page where the mode is
annunciated on the left side of the screen (figure 5-106).
The following abbreviations are used for mode annunci-
ation.
Mode Annunciation
Enroute-Leg ENR-LEG
Enroute-OBS ENR:274
Approach Arm-Leg ARM-LEG
Approach Arm-OBS ARM:259
Approach Active-Leg APR-LEG
The approach active-OBS mode is not a valid mode and
cannot be selected.
For the OBS modes, the number included in the annun-
ciation is the selected magnetic course. The course
may be changed by several different methods which are
described below.
5.9.1 Selecting The Leg Mode Or The OBS Mode
You will use one of two methods to change between
course modes depending on how the KLN 90B is
installed in your aircraft. In some installations, there will
be some type of external switch and annunciators that
will select the mode and indicate the status of the
course modes. In other installations these switches will
not be installed.
Use the following procedure to change to either the Leg
mode or the OBS mode when no external course mode
switch is installed:
1. Select the MOD type pages on the left side. The
MOD page corresponding to the active mode will be
displayed (figure 5-107).
Figure 5-107
ACTIVE MODE|
|
|
LEG |
|
CDI:±5.00NM|
MOD 1 enr-leg
PRESENT POS| $=KOSH
|+++++Ê+++++
LGA 045^fr|DIS 683nm
15.2nm|GS 193kt
N 41^00.00'|ETE 3:34
W 73^41.60'|BRG 303^
NAV 2 enr-leg NAV 1
Figure 5-106
80.2 oq
CEW |
xy-«} |
180 uv
áà0:26|
ûü085^|
†ü084^|160
CEW
SJI
MAI
Figure 5-105