sight

Next a point of known elevation, preferably one of the triangulation stations, is sighted; the vertical angle is read and the horizontal distance is scaled from the point of the setup on the map to the point sighted.

to sight a rifle or a cannon

Jim braced the gun and sighted, tried to pull the trigger. Beside him a body collapsed, limp. It was Max. A shot had gone through his brain. Jim stared down at him, numb with horror.