Cessna 172P - Page 277

PILOT'S
OPEN,ATING HANDBOOK
SUPPLEMENT
13
12
FOSTER
AN,EA
NAVIGATION
(TYPE õ11)
9. Left
\ttIPT
Pushbutton
Switch
--
PUSH in.
&. First waypoint
R ADIAL
and
DISTANCE
are
placed
in unit
as a
waypoint.
10.
RNAV BEAF,ING
Readout
--
OBSERVE
readout
for
magnetic
BEAA,ING
to
waypoint.
11.
RNAV RANGE lleadout
--
OBSERVE
readout of first
waypoint
distance.
tP,. TEST
Pushbutton
--
PRESS a,nd obgerve
that
the desired
BEAF,-
ING and RANGE readouts
of the waypoint
thumbwhegl
eettlngs
are displayed.
4,.
BEARING
Display
Readout
--
DISPLAYS
roadout
of first
b.
waypoint bearing.
RANGE Display
Readout
--
DISPLAYS
readout
of first
way-
point
distance.
c.
COURSE
DEVIATION INDICATOR
(CDI)
--
CDI
needle cen-
ters and
NAV/ÎO-F ROM indicator
displays
TO
if
OBS
setting
is at the value
of
the
radial
entered in
the waypoint
thi¡mb-
wheels.
DG or
HSI
--
CONTROL
AIRCRAFT
as required
to maintain
desired
track to or from waypoint.
NOTE
Due
to wind drift, it may be
necessary
to
fly a
few degrees
plus
or minus
the calculated BEARING
readout in
order
to
malntaln the
desired BEARING readout on
the
oomputer.
74. VOR/DME Pushbutton
--
PRESS
at an¡rtime
to observe
the
radial
and
DME distance from the VOF,TAC a,ssocia,ted
with the way-
point.
1õ.
Upon Waypoint
Passage
--
CHECK
or
SELECT
next dosired
waypoint's VOI1TAC froquoncy on the seleated
Nav
receiver
and
then
PRESS next WPT Pushbutton in and
repeat steps
9 through
12
to
proceed
to next
waypoint which was
dialed
in the
right set of
thumbwheels.
NOTE
Waypoint
pessage
will begin üo
be reflected
on the RNAV
BEARING
display about 1.5
NM
from the waypoint.
Way-
point
passago
wÍll be
reflected
by
a
rapid
change
of
BEAF,ING displays.
Therefore, the
pilot
should
fty the
established
inbound
predeternined
DG heading
until
waypoint
pessa,ge
has oocurred or until
tbo nextwaypont
is
selected.
7
30 May 1980