"Frankster" wrote in message
...

The problem with these damn 700 feet towers is that they are not tall
enough to require strobes (1000 ft) but are still tall enough to be very
dangerous to light planes. I have one in my area that is 980 ft.
Although, the owners of that tower put strobes on it anyway. I have to
believe that often the exact height of a tower is chosen due to marking
requirements (i.e. JUST less than 1000 feet).


Where is that 1000' requirement found? I believe the rules for the
construction, marking, and lighting of antenna structures is found in USC
Title 47 Part 17. The word "strobe" does not appear anywhere in Part 17.
It does refer to "high intensity and medium intensity obstruction lighting",
which would obviously include strobe lights, but the general requirement for
lighting begins at 200', not 1000'.


§ 17.21 Painting and lighting, when required.

Antenna structures shall be painted and lighted when:

(a) They exceed 60.96 meters (200 feet) in height above the ground or they
require special aeronautical study.

(b) The Commission may modify the above requirement for painting and/or
lighting of antenna structures, when it is shown by the applicant that the
absence of such marking would not impair the safety of air navigation, or
that a lesser marking requirement would insure the safety thereof.

[32 FR 11269, Aug. 3, 1967, as amended at 42 FR 54824, Oct. 11, 1977]