UFC 3-535-01
17 November 2005
CHAPTER 6: STANDARDS FOR OBSTRUCTION LIGHTING
6-1
PURPOSE
Obstruction lighting defines the vertical and horizontal limits of natural or manmade
objects which are considered a hazard to air navigation. Typical examples of various
obstruction lighting arrangements are shown in Figures 6-1 through 6-4.
6-2
OBJECTS TO BE LIGHTED
Objects that penetrate the planes and surfaces defined in UFC 3-260-01 are hazards to
air navigation and must have obstruction lights installed. Other objects, which are
hazards due to their nature or location even though they do not penetrate the planes
and surfaces, as defined above, must also be lighted. This includes obstructions that
affect TERPS criteria. Construction or objects which may impact navigable airspace
under the provisions of FAR Part 77 are also subject to the administrative procedures in
FAA AC 70/7460-1, Obstruction Marking and Lighting, for determining obstruction
marking and lighting requirements. Also, obstruction lighting is required on the facilities
and other obstructions along the periphery of the Building Restriction Line defined in
UFC 3-260-01.
6-3
LIGHTING CONFIGURATION
The number and arrangement of obstruction lights must ensure unobstructed visibility of
one or more lights from an aircraft at any normal angle of approach. Arrange obstruction
lights as specified in FAA AC 70/7460-1.
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