T-45C TS, ADV, & IUT RIFP-01
Introduction to Radio Instruments
E.
Adjustment techniques (Arc to Radial - Radial to
Sg 4, fr 9
Arc)
1.
Arc to radial intercept
a.
Inbound radial intercepts will require a
greater lead than outbound because
the aircraft is turning more than 90
degrees
ARC TO RADIAL INTERCEPT
ADJUSTMENTS
b.
For radial intercepts from arcs less
than approximately 10 DME, an
adjustment must be applied to the arc
to radial formula to compensate for
turns outbound of less than 90 degrees
and turns inbound of more than 90
degrees
(1) Degrees to turn outbound are
equal to 90 minus the number of
lead radials determined by formula
(2) Degrees to turn inbound are equal
to 90 plus the number of lead
radials determined by formula
(3) As a rule of thumb, reduce or
increase the lead radials
determined by formula by one-third
2.
Radial to arc intercept
Sg 4, fr 10
a.
When intercepting an arc from a
heading significantly more or less than
90 degrees from the arc, an adjustment
should be made to the result of the
formula for arc intercepts
(1) Use 1% for a turn of approximately
RADIAL TO ARC INTERCEPT
ADJUSTMENTS
90 degrees
(2) For a turn of approximately 45
degrees, use 1/3 of that required
for 90 degrees
(5-99) Original
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