Cessna 172P - Page 289

PILOT'S
OPER,ATING HANDBOOK
SUPPLEMENT
12A
R,NAV
(TYPE
ANS-3õ1C)
2.
SPEAKER,/PHONE
Selector Switches
(on
audio control
panel)
--
SET
NAV
2 to desired mode.
8.
COM
OFF/VOL
Control
--TURN
ON;
adjust NAV VOL
control
to
desired
audio
level.
4.
NAV Frequency
Selection
(on
No. 2 Nav
Receiver)
--
SELECT
the
local VOR,/DME
frequency.
5.
DME NAV
Mode
Seleator
Switah
--
SELECT RNAV
mode.
6.
DME DISPLAY
Selector Switch
--
SET
to NM.
7.
RNAV
Mode
Control
Knob
--
SELECT APPR,
(approach)
mode.
8.
RADIAL
and
DISTANCE
Selector
Knobs
--
SELECT
aII zeros.
9.
NAV
2 Indicator
OBS
Knob
--
ROTATE to oenter
the course
devÍation
pointer.
10.
DME DIGITAL
DISPLAY
--
NOTE DME distance display readout
(after
the
CDI
and
Distance displays
have
stabilized).
11.
RNAV
CHK Button
--
PRESS
to display raw VOR/DME
data. The
DME distance-to-VOR,
readout
should
agree with the
previous
(step
10)
RNAV
DME
distance-to-waypoint readout within 0.õ
NM.
I2.
DME NAV MODE
Selector Switch
--
SELECT
NAV 2 andobserve
that
the
CDI
remains
within 2 dots of center
and check that the DME
distance-to VOR display remains within 0.õ
NM of
the distance
displayed
in step 10.
PREV¡EWING
AND MODIFYING WAYPOINTS:
NOTES
Modifications
to the active waypoint
should not be made
while the
RNAV system is coupled
to the autopilot.
Any
of the waypoints
may
be
previewed
at anytime in any
mode.
1. WPT
Selector Knob
--
ROTATE until thedesiredwaypointnumber
is displayed.
2.
WPT Number
Display
--
OBSERVE
that number
is
blinking,
indicating
that the waypoint
is
a
preview
waypoint and
not the
active
waypoint.
3.
RADI^A'L and DISTANCE
Selector Knobs
--
SET
as
desired
if
preview
waypoint is to
be modified.
NOTE
OnIy the displayed
waypoint, whether it is the active
waypoint or
a
preview
waypoint,
will
be affeoted by the
data
(Radial
and Distance)
selector switches.
30 May
1980
TL