In ranged weapons such as firearms and artillery pieces, sighting in or sight-in is a preparatory or corrective calibration of the sights with the goal that the projectile (e.g. bullet or shell) may be placed at a predictable impact position within the sight picture. The principle of sighting-in is to shift the line of aim until it intersects the parabolic projectile trajectory at a designated point of reference, so when the gun is fired in the future (provided there is reliable precision) it will repeatably hit where it aims at identical distances of that designated point.
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| - Sighting in (en)
- Sighting in (pt)
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| - In ranged weapons such as firearms and artillery pieces, sighting in or sight-in is a preparatory or corrective calibration of the sights with the goal that the projectile (e.g. bullet or shell) may be placed at a predictable impact position within the sight picture. The principle of sighting-in is to shift the line of aim until it intersects the parabolic projectile trajectory at a designated point of reference, so when the gun is fired in the future (provided there is reliable precision) it will repeatably hit where it aims at identical distances of that designated point. (en)
- Sighting in (nesse contexto, algo como "alinhar a mira" em português) é a terminologia na lingua inglêsa para o ato de efetuar uma calibração preparatória ou corretiva da mira com o objetivo de que um projétil de artilharia ou a bala de uma arma de fogo possa ser colocado em uma posição de impacto previsível dentro da imagem da mira. (pt)
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| - This four-shot group requires sight adjustment to move the averaged point of impact to the right and slightly higher. (en)
- This four-shot group requires no sight adjustment, but a larger number of shots might confirm preliminary indications the group may be slightly left of center. (en)
- This five-shot group requires sight adjustment to move the averaged point of impact up and to the left. (en)
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| - High accuracy Low precision.svg (en)
- High precision Low accuracy.svg (en)
- Shot grouping on target.jpg (en)
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| - In ranged weapons such as firearms and artillery pieces, sighting in or sight-in is a preparatory or corrective calibration of the sights with the goal that the projectile (e.g. bullet or shell) may be placed at a predictable impact position within the sight picture. The principle of sighting-in is to shift the line of aim until it intersects the parabolic projectile trajectory at a designated point of reference, so when the gun is fired in the future (provided there is reliable precision) it will repeatably hit where it aims at identical distances of that designated point. Because when using a telescopic sight, the crosshair lines geometrically resemble the X- and Y-axis of the Cartesian coordinate system where the reticle center is analogous to the origin point (i.e. coordinate [0,0]), the designated sighting-in point is known as a zero, and the act of sighting-in is therefore also called zeroing. A gunsight that remains true to its designated zero after repeated usage is known as to "hold zero", while one that fails to do so is known as to "lose zero". The iterative procedure involves firing a group of shots from a cool gun barrel, then determining the geometric center of the shot pattern, adjusting the sights to move the point of aim to that group center, and repeating the process until further groups consistently center on the point of aim. (en)
- Sighting in (nesse contexto, algo como "alinhar a mira" em português) é a terminologia na lingua inglêsa para o ato de efetuar uma calibração preparatória ou corretiva da mira com o objetivo de que um projétil de artilharia ou a bala de uma arma de fogo possa ser colocado em uma posição de impacto previsível dentro da imagem da mira. No Brasil, é comum o uso da terminologia "calibrar a mira", ajustar a mira", "regular a mira" ou ainda, em linguagem coloquial: "zerar a mira" de uma arma; essas terminologias são usadas, tanto para miras abertas quanto para miras telescópicas, sendo usadas inclusive nos videogames. (pt)
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