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The main line of beacons stretched over some 720 km (450 mi). In the open spaces of central Asia Minor , the stations were placed over 97 km (60 mi) apart, while in Bithynia , with its more broken terrain, the intervals were reduced to ca. 56 km (35 mi).
A beacon is an intentionally conspicuous device designed to attract attention to a specific location.A common example is the lighthouse, which draws attention to a fixed point that can be used to navigate around obstacles or into port.
The towers were used for the transmission of a specific prearranged message. One tower would light its flame, the next tower would see the fire, and light its own. In Aeschylus tragedy Agamemnon , a slave watchman character learns the news of Troy 's fall from Mycenae by carefully watching a fire beacon.
The lamp (made in approx. 1914) burned vaporized kerosene (paraffin); the vaporizer was heated by a denatured alcohol (methylated spirit) burner to light. When lit, some of the vaporised fuel was diverted to a Bunsen burner to keep the vaporizer warm and the fuel in vapor form. The fuel was forced up to the lamp by air; the keepers had to pump ...
An airway beacon (US) or aerial lighthouse (UK and Europe) was a rotating light assembly mounted atop a tower. These were once used extensively in the United States for visual navigation by airplane pilots along a specified airway corridor. In Europe, they were used to guide aircraft with lighted beacons at night. [1] [2]
These were generally made of wood, as it was readily available. Due to the fire hazard, masonry towers were increasingly built - the oldest standing masonry tower was Sandy Hook Lighthouse, built in 1764 in New Jersey. Screw-pile lighthouses were used in Chesapeake Bay and along the Carolina coast in the United States. The first screw pile ...
A Belisha beacon atop its striped pole. This example also features a spot lamp to illuminate the crossing at night. A Belisha beacon (/ b ə ˈ l iː ʃ ə /) is a yellow-coloured globe lamp atop a tall black and white striped pole, marking pedestrian crossings of roads in the United Kingdom, [1] Ireland, and other countries historically influenced by Britain, such as Hong Kong, Cyprus, Malta ...
These are the remnants of Transcontinental Air Mail Route Beacon 37A, which was located atop a bluff in St. George, Utah, U.S.A. With concrete arrows indicating the direction to the next beacon, a rotating light tower, and a shed that usually held a generator and fuel tanks, these beacons were once situated every 10 miles on air routes across the United States beginning around 1923.