An Air traffic obstacle is a tall structure which can endanger air traffic. Air traffic obstacles have to be marked in most cases with red and white colored markings and with aircraft warning lights at night. On larger structures blinking lights are required. An example of an air traffic obstacle is the air traffic control tower.
In the past lamps similar to those used on lighthouses were sometimes used. There are still such lamps on Fernsehturm Stuttgart in Stuttgart, Germany. A fainter rotating light is on Blosenbergturm, Beromünster, Switzerland.
A special method of marking was used at the mast of Deutschlandsender Herzberg/Elster in 1939. On small poles near the mast multiple rotating skybeamers were mounted which illuminated the lens-like structure on the top. Because of this no electrical installation was required on this mast.
Famous quotes containing the words air, traffic and/or obstacle:
“We’re talking scum here. Air should be illegal if they breathe it.”
—Washington, DC, Policeman. quoted by P.J. O’Rourke in Rolling Stone (New York, 30 Nov. 1989)
“Too much traffic with a quotation book begets a conviction of ignorance in a sensitive reader. Not only is there a mass of quotable stuff he never quotes, but an even vaster realm of which he has never heard.”
—Robertson Davies (b. 1913)
“But this we know, the obstacle that checked
And tripped the body, shot the spirit on
Further than target ever showed or shone.”
—Robert Frost (1874–1963)