Pattern Side for Military Aviation.

DOE-STD-3014-96

APPENDIX B

R cos (

)

(B-1)

and

R sin (

)

(B-2)

where:

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