Sample Problem - Continued

DOE-STD-3014-96

APPENDIX B

The analyst should then measure the distance along the x axis from the center of the

airport to the intersection point. This is the magnitude of x. If the direction of flight is

toward the facility, x is positive; if the direction of flight is away from the facility, x is

negative. Then measure from the intersection point to the facility. This is the

magnitude of y. If the facility is to the left of the positive x axis (direction of flight), y is

positive; if the facility is to the right of the positive x axis (direction of flight), y is

negative. In this example, the orthonormal distance for Airport 2, Runway 0, is

(8.9, - 0.8), and the orthonormal distance for Airport 2, Runway 18, is (-8.9, 0.8).

The next step is to determine the crash location probability f(x, y) for each category of

aircraft and flight phase at each airport. For commercial and general aviation, this is

straightforward; the analyst reads the value defined by the coordinates determined

above. For military aviation, the analyst first needs to determine the pattern side with

respect to the direction of flight and then use the correct table. For example, for

Airport 2, Runway 0, the pattern side is to the left, and the analyst should use

Tables B-7, B-9, B-11, and B-13. For Airport 2, Runway 18, the pattern side is to the

right of the direction of flight, and the analyst should use Tables B-6, B-8, B-10,

and B-12.

The analyst should then enter the crash rates from Table B-1 into the data collection

tables. After this is completed for all the airports, the data collection tables (based on

Table B-21) should look like Tables B-28 through B-33.

B-38