backsight (suomeksi)

Määritelmät:

The rear sight of a firearm.
(lb, en, surveying) A measurement or reading taken back towards a point of known elevation, used to calculate the height of the surveying instrument (theodolite, transit, total station).
(lb, en, surveying) A measurement of a previously shot point, used to set the angle to zero when occupying a new position.
(lb, en, surveying) To shoot a backsight.