Cessna 1980 182Q Pilot's Operating Handbook And Flight Manual page 339

28
PILOT'S OPERATING HANDBOOK
SUPPLEMENT
CESSNA 400 NAV/COM
(RT-485A) WITH CESSNA
400 RNAV (RN-478A)
12. COMMUNICATION RECEIVER FREQUENCY SELECTORS - Outer knob
changes COM frequency in l-MHz steps between 118 and 135 MHz; inner knob
changes COM frequency in .05 MHz steps between .025 and .975 MHz or between
.000 and .950 MHz depending on setting of C button.
13. COM OFF-VOLUME CONTROL (OFF-VOL) - Combination ON/OFF switch and
volume control; turns on Nav/Com set and controls volume of COM receiver
audio.
14. COURSE CARD - Indicates selected VOR course under course index.
15. BACK-COURSE LAMP (BC) - Amber light illuminates when an autopilot's
back-course function is engaged and receiver is tuned to a localizer frequency;
indicates course deviation pOinter is reversed. Light diinming is only available
when installed with an audio control panel incorporating the annunciator lights
DAY/NITE selector switch. .
16. AREA NAV LAMP (RN) - When green light is illuminated. indicates that RNA V
operation is selected. Light dimming is only available when installed with an
audio control panel incorporating the annunciator lights DAY /NITE selector
switch.
17. OMNI BEARING SELECTOR (OBS) - Rotates course card (12) to select desired
bearing to or from a VOR station or to a selected RNA V waypoint.
18. COURSE INDEX - Indicates selected VOR or RNA V course (bearing).
19. COURSE DEVIATION POINTER - Indicates course deviation from selected
VOR or RN'AV course' or localizer centerline.
20. OFF/TO-FROM INDICATOR - Operates only with VOR. localizer or RNAV
signal. OFF position (flag) indicates unusable signal. With usable VOR signal.
when OFF position disappears. indicates whether selected course is TO or FROM
station or waypoint. With usable localizer signal. TO flag is in view.
21. RECIPROCAL COURSE INDEX - Indicates reciprocal of selected VOR or RNA V
course.
22. NAV INDICATOR FLAG - When in view. red NAV position (Flag) indicates the
selected VOR or localizer signal is unusable.
23. AUTOMATIC RADIAL CENTERING (ARC -PUSH-TO/PULL-FR) SELECTOR -
In center detent. functions as conventional OBS. Pushed to inner (Momentary
On) position. turns OBS course card (14) to center course deviation pointer (19)
with a TO flag (24). then returns to conventional OBS selection. Pulled to outer
detent. continuously drives OBS course card (14) to indicate bearing from VOR
station. keeping course deviation pointer (19) centered. with a FROM flag (24).
ARC function will not operate on localizer frequencies.
Figure
1.
Cessna 400 Nav/Com Set, Operating Controls and Indicators
(Sheet 3 of 4)
1 October 1979 5