Difference between revisions of "Beacon"
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==Origin== | ==Origin== | ||
| − | [ | + | [https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] ''beken'', from [https://nordan.daynal.org/wiki/index.php?title=English#ca._600-1100.09THE_OLD_ENGLISH.2C_OR_ANGLO-SAXON_PERIOD Old English] ''bēacen'' sign; akin to Old High German ''bouhhan'' [[sign]] |
| − | *[ | + | *[https://en.wikipedia.org/wiki/14th_century 14th Century] |
==Definitions== | ==Definitions== | ||
*1: a [[signal]] [[fire]] commonly on a hill, tower, or pole | *1: a [[signal]] [[fire]] commonly on a hill, tower, or pole | ||
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A '''beacon''' is an intentionally conspicuous device designed to attract attention to a specific location. | A '''beacon''' is an intentionally conspicuous device designed to attract attention to a specific location. | ||
| − | Beacons can also be combined with semaphoric or other indicators to provide important [[information]], such as the status of an airport, by the [[colour]] and rotational [[pattern]] of its [ | + | Beacons can also be combined with semaphoric or other indicators to provide important [[information]], such as the status of an airport, by the [[colour]] and rotational [[pattern]] of its [https://en.wikipedia.org/wiki/Aerodrome_beacon airport beacon], or of pending [[weather]] as indicated on a [https://en.wikipedia.org/wiki/Weather_beacon weather beacon] mounted at the top of a tall building or similar site. When used in such fashion, beacons can be considered a form of [https://en.wikipedia.org/wiki/Telegraph#Optical_telegraph optical telegraphy]. |
| − | Beacons help [[guide]] navigators to their destinations. Types of [[navigation]]al beacons include [[radar]] reflectors, [ | + | Beacons help [[guide]] navigators to their destinations. Types of [[navigation]]al beacons include [[radar]] reflectors, [https://en.wikipedia.org/wiki/Radio_beacons radio beacon], sonic and visual signals. Visual beacons range from small, single-pile structures to large [https://en.wikipedia.org/wiki/Lighthouse lighthouses] or light stations and can be located on land or on water. Lighted beacons are called ''lights''; unlighted beacons are called ''daybeacons''. |
''Beaconing'' is the [[process]] that allows a network to self-repair network problems. The stations on the network notify the other stations on the ring when they are not receiving the transmissions. Beaconing is used in Token ring and FDDI networks. | ''Beaconing'' is the [[process]] that allows a network to self-repair network problems. The stations on the network notify the other stations on the ring when they are not receiving the transmissions. Beaconing is used in Token ring and FDDI networks. | ||
| − | Classically, beacons were [[fires]] lit at well-known locations on hills or high places, used either as lighthouses for [[navigation]] at [[sea]], or for signalling over [[land]] that [[enemy]] troops were approaching, in order to alert defenses. As signals, beacons are an ancient form of [ | + | Classically, beacons were [[fires]] lit at well-known locations on hills or high places, used either as lighthouses for [[navigation]] at [[sea]], or for signalling over [[land]] that [[enemy]] troops were approaching, in order to alert defenses. As signals, beacons are an ancient form of [https://en.wikipedia.org/wiki/Optical_telegraph optical telegraphy], and were part of a [https://en.wikipedia.org/wiki/Relay_league relay league]. |
| − | Systems of this kind have existed for centuries over much of the world. In Scandinavia many [ | + | Systems of this kind have existed for centuries over much of the world. In Scandinavia many [https://en.wikipedia.org/wiki/Hill_forts hill forts] were part of beacon networks to warn against invading pillagers. In Wales, the [https://en.wikipedia.org/wiki/Brecon_Beacons Brecon Beacons] were named for beacons used to warn of approaching English raiders. In England, the most famous examples are the beacons used in Elizabethan England to warn of the approaching [https://en.wikipedia.org/wiki/Spanish_Armada Spanish Armada]. Many hills in England were named [https://en.wikipedia.org/wiki/Beacon_Hill Beacon Hill] after such beacons. In the Scottish borders country, a system of beacon fires were at one time established to warn of incursions by the English. Hume and Eggerstone castles and Soltra Edge were part of this network.[1] The [https://en.wikipedia.org/wiki/Great_Wall_of_China Great Wall of China] is also a beacon network.[https://en.wikipedia.org/wiki/Beacon] |
[[Category: General Reference]] | [[Category: General Reference]] | ||
[[Category: History]] | [[Category: History]] | ||
Latest revision as of 23:40, 12 December 2020
Origin
Middle English beken, from Old English bēacen sign; akin to Old High German bouhhan sign
Definitions
- b : a radio transmitter emitting signals to guide aircraft
- 3: a source of light or inspiration
Description
A beacon is an intentionally conspicuous device designed to attract attention to a specific location.
Beacons can also be combined with semaphoric or other indicators to provide important information, such as the status of an airport, by the colour and rotational pattern of its airport beacon, or of pending weather as indicated on a weather beacon mounted at the top of a tall building or similar site. When used in such fashion, beacons can be considered a form of optical telegraphy.
Beacons help guide navigators to their destinations. Types of navigational beacons include radar reflectors, radio beacon, sonic and visual signals. Visual beacons range from small, single-pile structures to large lighthouses or light stations and can be located on land or on water. Lighted beacons are called lights; unlighted beacons are called daybeacons.
Beaconing is the process that allows a network to self-repair network problems. The stations on the network notify the other stations on the ring when they are not receiving the transmissions. Beaconing is used in Token ring and FDDI networks.
Classically, beacons were fires lit at well-known locations on hills or high places, used either as lighthouses for navigation at sea, or for signalling over land that enemy troops were approaching, in order to alert defenses. As signals, beacons are an ancient form of optical telegraphy, and were part of a relay league.
Systems of this kind have existed for centuries over much of the world. In Scandinavia many hill forts were part of beacon networks to warn against invading pillagers. In Wales, the Brecon Beacons were named for beacons used to warn of approaching English raiders. In England, the most famous examples are the beacons used in Elizabethan England to warn of the approaching Spanish Armada. Many hills in England were named Beacon Hill after such beacons. In the Scottish borders country, a system of beacon fires were at one time established to warn of incursions by the English. Hume and Eggerstone castles and Soltra Edge were part of this network.[1] The Great Wall of China is also a beacon network.[1]
