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DOE-STD-3014-96
APPENDIX B
x
R cos (
)
(B-1)
and
R sin (
y
)
(B-2)
where:
R
=
distance from the facility (miles);
=
bearing from the facility to the airport;
=
runway bearing as an angle with respect to magnetic north (this
equals the runway number times ten).
B.3.2 Pattern Side for Military Aviation. For military aviation, a landing often involves an
initial approach over the runway followed by a turn to a downwind leg parallel to the
runway, a base leg turn, and a final approach to a full-stop landing. This flight pattern
is usually performed on a specified side of the runway, referred to as the pattern side.
All local operations, e.g., touch-and-goes, also involve pattern side flight. This
concentration of traffic on the pattern side of the runway is reflected in the crash
locations, thus influencing crash location probabilities. In other words, there tends to
be a bias toward the pattern side. To accommodate this, separate tables of crash
location probabilities are provided for cases when the pattern side is to the left of the
direction of flight and cases when it is to the right of the direction of flight. The pattern
side is shown in Figure B-2
B-6