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Alidade - Wikipedia, the free encyclopedia
An alidade (archaic forms include alhidade , alhidad , alidad ) is a device that allows one to sight a distant object and use the line of sight to perform a task. This task can be, for example...
en.wikipedia.org/wiki/Alidade
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"Alidade or Indicator for Ships' Compasses", This unmarked set came from Buff & ... "Shop Samples Burgess Ailrcam Alidade Property of Buff & Buff Mfg. Co. ...
www.antiquesurveying.com/alidades.htm www.antiquesurveying.com/alidades.htm
On ships an Alidade is used to measure the angle from the ship's longitudinal axis to some target or targets, typically to help determine the ships position relative to the target(s). Large telescopes have an alidade system that's used to point in azimuth...
www.prc68.com/I/Alidade.shtml www.prc68.com/I/Alidade.shtml
General Alidade ... Form the care and adjustment of K&E SURVEYING INSTRUMENTS brochure is a description of why you would use an Alidade: ... In my opinion this instrument is one of those made at the peak of alidade development. Instead of using a vernier scale to read vertical angles this instrument uses optical scales...
www.prc68.com/I/KandE760000.shtml
Britannica online encyclopedia article on alidade (instrument), The Arabs employed similar instruments with diametric sight rules, or alidades, and it is likely that those made and used in the 12th century by Moors in Spain were the prototypes of all later European armillary spheres. ... and a straight rule (the alidade),
www.britannica.com/EBchecked/topic/15385/alidade www.britannica.com/EBchecked/topic/15385/alidade
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Mariner's astrolabe - Wikipedia, the free encyclopedia
The mariner's astrolabe , also called sea astrolabe , is not an astrolabe proper, but rather a graduated circle with an alidade used to measure vertical angles. In the sixteenth century, the instr...
en.wikipedia.org/wiki/Mariner's_astrolabe
position the plane table at A, placing the alidade along the line A'B' and turning the table with attached map until the A'B' line-of-sight coincides exactly with its corresponding AB line...
uregina.ca/~sauchyn/geog411/mapping.html · Cached
(engineering) An alidade used with a plane table, consisting of a telescope mounted on a straightedge ruler, fitted with a level bubble, scale, and vernier to measure angles, and calibrated to measure distances.
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