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CESSNA
MODEL
182S
SECTION
9
- SUPPLEMENTS
SUPPLEMENT 5
-
FAA APPROVED
6.
NAV/GPS SWITCH
--
Toggles from Nav 1
to
GPS and
vice
versa
to
control
the type of navigation data
lo
be displayed
on
the CDI
(Course Deviation lndicator).
The
No.
1
CDI
Omni
Bearing Selector (OBS) provides analog course input
to
the
KLN 898 in OBS
mode when
the
NAV/GPS
switch/annunciator
is in GPS.
When
the
NAV/GPS
switch
annunciation
is in NAV, GPS course
selection
in OBS mode
is
digital
through
the
use of the controls and display at
the
KLN
898.
NOTE
Manual CDI course centering
in OBS
mode using
the
control
knob
can
be
difficult, especially
at
long
distances.
Centering
the
Course Deviation
lndicator
(CDl) needle can best be
accomplished
by
pressing the
Direct-To button and then manually setting
the
No.
1
CDI course to the course value prescribed in
the
KLN
89B displayed message.
NOTE
The Directional Gyro heading (HDG) bug must also
be
set
to
provide proper course dalum
to the
autopilot
if
coupled
to the KLN 898 in LEG or
OBS.
(When
the
optional
HSI is
installed,
the
HSI
course
pointer provides
course datum
to
the
autopilot.)
7.
NAVIGATION SOURCE (NAV) ANNUNCIATOR
-- The
NAV
annunciator
will illuminate steady
to
inform
the pilot that
NAV
1
information is being displayed
on
the
NAV
1
CDl.
L
NAVIGATION SOURCE (GPS) ANNUNCIATOR
-- The
GPS
annunciator will illuminate steady
to
inform
the pilot that
GPS
information is being displayed
on
the
NAV
1
CDl.
July
15/98
Figure
1.
GPS Annunciator/Switch (Sheet
3
of
3)
ss-e
I
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