Cessna 172P - Page 285

PILOT'S
OPERATING HANDBOOK
SUPPLEMENT
12A
RNAV
(TYPE
ANS-351C)
22.
OMNI
BEARING SELDCTOR,
(OBS) -
Rotates course card
(19)
to
select desired
bearing
to or
from
a, VOR station or
to
or from
e selected RNAV waypoint.
23. RECIPROCAL COURSE
INDEX -
Indicates
reciprocal
of selected
VOR or RNAV
cours€.
24. OFF/TO-FROM
INDICATOR
-
Operaûes only with VOR.
localizer
or RNAV
signal, OFF
position
(red
firig)
indicates unusable signal.
With
usabte VOR,
signal,
when
OFF
position
disappears,
índicates whether selôcted
course
is TO or
FROM
station
or waypolnt.
With usable
localÞer signal, white
TO flag
is in view.
26,
COUR,SE
DEVIATION
POINTER
-
Indicatos
course
deviation from
selected
VOR,
or RNAV
course or
localizer centerline,
26. COURSE INDEX
-
Indicates
select€d
VOR or FTNAV courso
(bearing).
27. GLIDE
SLOPE
DEVIATION POINTER
-
Indicates deviation
from ILS
glide
elope.
28
GLIDE SLOPE
"OFF'
FLAG
-
When
visible, red OFF flag indicates unrelÍable
glide
slope signal
or improperly
operating oquipment. Flag disappears when
a
reliable
glide
slope signal
is
being
recoived.
Figure 1. ANS-351C
Computer,
IND-450C
Indicator
and Associa,ted
CDI Controls (Sheet
5 of 5)
7
3C
May 1980