MIN indicator. Displays time to TACAN
station in minutes.
Avionics TACAN Operation.
Turn on procedure:
Power switch (fig. 3-18) ON.
Volume control As required.
Course indicator switches (fig. 230)
RMI switches TACAN.
Self-test procedure: Course knob on pilot's
Centered, with course knob set to 180
±2 degrees, and TO-FROM indicator
RMI bearing pointers (fig. 310) Point
to 180 degrees.
HSI course knob Increase the selected
course. The lateral deviation bar on a
180 ±2 degrees TO indication and the
indicator read 180 degrees. Using
the course knob, increase the selected
course, the lateral deviation bar will
course, the deviation bar will center,
then move to the right of center. Full
scale deflection will be 10 ± 1°.
Normal Operating Procedure:
RMI single needle switch (fig. 3-10) VOR-
RMI selector switch (instrument panel, fig.
Course indicator selector switch (instrument
panel, fig. 2-30) TACAN.
TACAN X-Y switch As required.
TACAN channel selector knobs Select
Wait 5 seconds for signal acquisition and
If bearing lock-on is not obtained, perform
operation of the system. Anytime a course
indicator NAV or VOR LOC flag is in
view, bearing, lateral deviation, and TO-
FROM information may be inaccurate and
should be disregarded.
Insure that audio station identification
signal is correct for the ground station
RMI single-needle pointer Read bearing to
HSI course control knob Set desired course.
HSI lateral deviation bar Read deviation
from selected course. Course arrow will
show wind correction angle when the lateral
deviation bar is centered and the aircraft is
tracking the selected course.
TACAN indicator Read distance to station.
To determine course TO or course FROM a
TACAN station, rotate course knob (pilot's
HSI) until lateral deviation bar is centered
and the TO-FROM pointer reads TO or
To use TACAN during pilot-controlled
flight, control aircraft by manual controls,
responding to information displayed on the
flight director, RMI, HSI, TACAN, and
To use TACAN with the autopilot, engage
autopilot and monitor autopilot performance
on flight director, RMI, HSI and TACAN
indicators. Verify adherence to preset
heading and course, and confirm the
execution of displayed steering commands.
The TACAN ground speed reading
will be accurate only when the
aircraft is on a course directly to or
from the TACAN station.
Shutdown procedure: TACAN power switch
(fig. 3-18) OFF.