Cessna 152 - Page 198

CESSNA
300
NAV/COM
(TYPE
RT-385A)
PILOT'S
OPERATING
HANDBOOK
SUPPLEMENT
18.
RECIPROCAL
COURSE
INDEX
-
Indicates
reciprocal
of
selected
VOR
course.
19. OMNI
BEARING
SELECTOR
(OBS) -
Rotates
course
card
to
select
desired
course.
20.
AUTOMATIC
RADIAL
CENTERING
(ARC-PUSH-TO/PULL-FR)
SELECTOR
-
In
center
detent,
functions
as
conventional
OBS.
Pushed
to
inner
(Momente,ry On)
position,
turns
OBS
course
card
to
center
course
deviation
pointer
with
a TO
flag,
then
returns
to
conventional
OBS
selection.
Pulled
to
outer
detent,
continuously
drives
OBS
course
card
to
indicate
bearing
from
VOR
station,
keeping
course
deviation
pointer
centered,
with
a
FROM
flag.
ARC
function
will
not
operate
on
localizer
frequencies.
21. AUTOMATIC
RADIAL
CENTERING
(ARC)
LAMP
-
Amber
light
illuminates
when
Automatic
Radial
Centering
is
in
use.
22.
COURSE
CARD
-
Indicates
selected
VOR
course
under
course
index.
4 1
July
1978