Cessna 172P Pilot's Operating Handbook And Flight Manual 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