sighting bar

sighting bar

[′sīd·iŋ ‚bär]
(ordnance)
Wooden device with enlarged front and rear sight, eyepiece, and a movable target, used for training in the proper method of aiming a small-arms weapon; the eyepiece forces the student to hold the eye in proper position; because of the size of the sights, errors of aiming are very apparent.
References in periodicals archive ?
The mater can be suspended from a hook and its back is calibrated so that, with the aid of a sighting bar called the alidade, the altitudes of the Sun or stars can be observed.
In use for high trajectory fire, the sighting bar is pulled to the rear, rotated up, and locked into place in the first notch (45-degrees) for ranges between 200 to 400 meters or in the second notch (740-degrees) for targets between 100 and 200 meters.
For a target estimated to be at 175 meters, engage the sighting bar in the 74-degree notch and place the sliding ring on the 18 mark.
With variable scopes the spacing between the sighting bars changes as power is changed.