APPENDIX VII: COMPUTER BENCHMARK FOR COMPUTED JUMP DISTANCES

Distance AB = BC = 25M A-B-C is a straight line.

Jump position relative to A: 10m back, 40m out. Jump is exactly parallel to ABC.
Note: The example shown is theoretical and does not imply that jump setups must conform to this diagram.
For jump distances and records to be certified, the jump meters must be set up so that the angles, read from each station, using the official protractors, to the sighting mark (Rule 11.17.8), produce an error triangle with an inscribed circle of less than or equal to .15m.
For the setup shown, some examples might be as follows: 

				Tri-
Angle A	Angle B	Angle C	X	Y	angle	Results
75.9638	48.8141	33.6901	10.0	40.0	0.0	OK
76.0	48.8	33.7	9.99	39.99	0.031	OK
75.9	48.9	33.6	9.94	39.93	0.169	Bad
Note: X and Y positions are rounded to .01m.
To verify that a computer program is computing distances according to the IWSF Rules, the operator must show that it produces identical results with the test cases that follow based on the setup given in the diagram. Note that the triangle size is rounded to .001m 
	A		B		C		Dist-	Tri-
No.	Upper / Lower	Upper / Lower	Upper / Lower	ance	angle
1.	136.6 / 136.6	106.8 / 106.8	65.6 / 65.6		45.5	0.0
2.	136.0 / 136.0	106.0 / 106.0	67.0 / 67.0		45.5 	0.560
3.	136.9569 / 136.2431	107.2972 / 106.3028	66.073 / 65.127	45.5 	0.0
4.	136.96 / 136.24	107.3 / 106.3	66.1 / 65.1		45.5	0.0
5.	136.6 / 137.32	106.8 / 107.8	66.6 / 65.6		45.5	0.0
6.	137.751 / 137.751	106.8 / 106.8	65.6 / 65.6		45.7	0.600
7.	137.753 / 137.753	106.8 / 106.8	65.6 / 65.6		45.3 	0.601
8.	136.6 / 135.8	106.8 / 106.8	65.6 / 65.6		45.5 	0.211
9.	136.7963 / 136.7963	106.8 / 106.8	65.6 / 65.6		45.5	0.103
10.	136.7964 / 136.7964	106.8 / 106.8	65.6 / 65.6		45.6 	0.104
Case 7: Possible Reride - Longest Vertex = 46.1 - Shortest Vertex = 45.3