T-45C TS, ADV, & IUT RIFP-02
TACAN and VOR Procedures
4.
Turn aircraft to the intercept heading
5.
Maintain intercept heading to lead point and then
complete intercept of desired course
III. Flying TACAN/VOR DME arc 2.7.5.1.4.1
A.
Lead point calculation (LPC)
1.
For a 90-degree intercept: approximately 1% of
ground speed = DME lead point using 1/2 SRT
a.
Inbound to the station add 1% of ground speed
to the DME of the arc
b.
Outbound from the station, subtract 1% of
ground speed from the arc
2.
For intercepts of less than 90 degrees: use a
proportional distance lead point of less than 1%
B.
Chord method
NOTE: The chord method is usually used when the
aircraft is more than 12 miles DME from the station.
1.
Tune and identify station
2.
Determine direction to turn
3.
Determine desired lead point
4.
Initiate turn when DME equals radius of arc plus or
minus desired lead using 1/2 SRT AOB
5.
Monitor the bearing pointer and DME to determine
roll-out
6.
Position aircraft so that head of the bearing pointer
is between 5 and 10 degrees ahead of wingtip
position
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