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I
I
BACK COURSE (BC) MODE
USING THE KG 107/Kl 206
INDICATORS
In the back course (BC) mode the
autopilot intercepts and tracks a reverse
course ILS. To operate in the BC mode
(with the KAP 150 currently in the HDG
mode):
1.
Tune the frequency for the selected
2. Select the back course mode by
ILS back course.
either depressing the "APR" button
and then the BC button, or by merely
depressing the BC button itself. (The
"HDG" light will remain illuminated, BC
will illuminate, and the "APR" light will
flash to signify that the APR mode is
armed.)
3. Within five seconds, move the heading
'bug" on the KG 107 to the same mag-
netic heading as the selected front
course (090 degrees in this example).
NOTE: If the BC APR mode is selected with
the aircraft level within
*4
degrees and
within 2-3 dots of course deviation, BC APR
arm mode will be bypassed and the BC
APR mode will engage directly.
4. The autopilot will fly an automatic 45
degree intercept heading until within
the capture zone, then intercept and
fly the desired course, which will be a
reciprocal to the front course. (The
"HDG" light will go
off
and the "APR"
light will illuminate steadily as the BC
mode goes from arm to engage.)
5.
The autopilot will bank as required to
maintain course. Automatic crosswind
compensation will provide precise
tracking. (The glideslope is locked
out because this is a back course
approach.)
(See page 50/51 for illustration)
44
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