Backsight

Backsight
Backsight Back"sight` (b[a^]k"s[imac]t`), n. [Back, adv. + sight.] (Surv.) The reading of the leveling staff in its unchanged position when the leveling instrument has been taken to a new position; a sight directed backwards to a station previously occupied. Cf. {Foresight}, n., 3. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • backsight — 1. noun a) The rear sight of a firearm. b) A measurement or reading taken back towards a point of known elevation, used to calculate the height of the theodolite. 2. verb To shoot a backsight …   Wiktionary

  • backsight — /bak suyt /, n. Survey. 1. a sight on a previously occupied instrument station. 2. (in leveling) the reading on a rod that is held on a point of known elevation, used in computing the elevation of the instrument. [1840 50; BACK2 + SIGHT] * * * …   Universalium

  • backsight — n. rear sight on a firearm; (in leveling) reading on a rod which is held on a point of known elevation …   English contemporary dictionary

  • backsight — /ˈbæksaɪt/ (say baksuyt) noun Surveying 1. a sight on a previously occupied instrument station. 2. the reading on a levelling staff that is held on a point of known elevation, used in computing the elevation of the levelling instrument …  

  • backsight — n. 1 the sight of a rifle etc. that is nearer the stock. 2 Surveying a sight or reading taken backwards or towards the point of starting …   Useful english dictionary

  • blow a backsight — verb To occupy a point, then enter the wrong point for the backsight, or forget to enter the backsight …   Wiktionary

  • Course Setting Bomb Sight — The CSBS Mk. IX mounted in a Fairey Battle. The bomb aimer is sighting through the white ring shaped backsights to the pin shaped foresights (just visible against the armoured cable) and holding the bomb release switch in his right hand. The… …   Wikipedia

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  • Levelling — For other uses, see Levelling (disambiguation). Single levelling redirects here. For other uses, see Single level (disambiguation). Levelling or leveling is a branch of surveying, the object of which is 1) To find the elevation of a given point… …   Wikipedia

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