Textron Cessna 172R - Page 470

SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
19
-
FAA
APPROVED
CESSNA
MODEL
172R
1.
HSI
ANNUNCIATOR
LIGHT
-
This label
is
present
when the
optional
HSI
is
installed. The
HSI
course
pointer
provides
course
datum
to
the
autopilot.
2.
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
CDI.
3.
NAVIGATION SOURCE
(GPS)
ANNUNCIATOR
-
The
GPS
annunciator
will
illuminate
steady
to
inform
the
pilot
that
GPS
information
is
being displayed
on
the
NAV
1
CDI.
4.
NAV/GPS
SWITCH
--
Toggles
from
Nav
1
to
GPS
and vice
versa
to
control
the
type
of
navigation
data
to
be
displayed
on
the
CDI
(Course
Deviation
Indicator).
The
No.
1
CDI
Omni
Bearing
Selector
(OBS)
provides
analog
course
input
to
the
KLN
94
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
94.
Figure
2.
GPS
Annunciator/Switch
(Serials
17280984
and
On)
(Sheet
1
of
2)
S19-10
Dec
30/00
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