UFC 3-535-01
17 November 2005
3-1.4
Aiming Criteria
Aim the beams of all approach lights into the approach zone and away from the
threshold, with the beam axis parallel to the extended runway centerline. Vertical aiming
of the elevated, uni-directional, steady burning lights at the elevation angles in
accordance with Table 3-1. These aiming angles are based on a three degree glide
slope. If other glide slope angles are used, adjust the vertical aiming for the same
degree of difference. Some existing SFL may have fixed angles for the beam. Refer to
paragraph 4-4.9 when threshold lights are used as part of an approach system.
Table 3-1. Elevation Setting Angles for ALSF-1
STEADY-BURNING TYPE FAA-E-982 LIGHTS
Setting Angle above
Setting Angle above
Station
Horizontal* (Degrees)
Station
Horizontal * (Degrees)
Preferred
Permitted
Preferred
Permitted
30+00
8.0
8.0
14+00
7.0
7.0
29+00
7.9
8.0
13+00
6.9
7.0
28+00
7.9
8.0
12+00
6.9
7.0
27+00
7.8
8.0
11+00
6.8
7.0
26+00
7.7
7.5
10+00
6.7
6.5
25+00
7.6
7.5
9+00
6.7
6.5
24+00
7.6
7.5
8+00
6.6
6.5
23+00
7.6
7.5
7+00
6.5
6.5
22+00
7.5
7.5
6+00
6.5
6.5
21+00
7.4
7.5
5+00
6.4
6.5
20+00
7.4
7.5
4+00
6.3
6.5
19+00
7.3
7.5
3+00
6.3
6.5
18+00
7.2
7.0
2+00
6.2
6.0
17+00
7.2
7.0
1+00
6.2
6.0
16+00
7.1
7.0
0+00
6.1
6.0
15+00
7.0
7.0
* For approach slopes other than 3 degrees, adjust the setting angles for the
difference.
Tolerances are 0.2 degrees.
Elevated SFL are all aimed 6 degrees above horizontal.
3-1.4.3
Obstruction Clearances
18
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