PILOT'S
OPEN,ATING HANDBOOK
SUPPLEMENT
12A
RNAV
(TYPE
ANS-851C)
6. REPEAT
Steps
4 and õ to
program
remaining waypoints.
NOTE
The displayed waypoint data in the
RADIAL
and
DIS-
TANCE
displays
before modification
is never retained
after new waypoint dàta has
been entered.
If
the
active
waypoint is revieed, tho new data will immediately be used
in the
RNAV computation. Similarly,
previewed
way-
points,
once modifled, retain the new data until
the way-
point
definition is again modified, or the system
is turned
off.
7.
RTN
(Return)
Pushbutton
--
PF,ESS to display
active
waypoint.
CHANGING WAYPOINTS IN
FLIGHT:
1.
WPT Selector
Knob -- ROTATE until
thedesiredwaypointnumber
and coordinates are
displayed.
2. VHF Nav 2 Receiver
--
SELECT
the desired
reference
frequency
and
identify station by listening
to ident tone.
3. Nav Indicator OBS Knob
--
SET
to desired course.
4.
USE
Pushbutton
--
PRESS
a,nd
observe
that the waypoÍnt identÍfi-
cation number stops blinking.
5.
DME
Display
Selector
Switch
--
SELECT desired
display readout.
(Distanoe-to-waypoint
will be displayed
when NM
position
is
selected.)
NOTE
In the KTS and MIN modes,
allow
10-12 minutes to attain
a
90-95
percent
final
(stabilized)
calculatedvalue in
theENR
mode
or
4-5 minutes
to
attain a 90-95
percent
final
(stabil-
ized)
calculated value
in the
APPR mode.
The NM display
is accurate
immediately after
"lock
on".
3O
May
1980
13
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