TM 5-6675-328-14
GLOSSARY
ABBREVIATION/TERM
DEFINITION
Aim ......................................................................................................... To regulate direction of a sighting device.
Alidade.................................................................................................... All upper parts of theodolite that turns in
............................................................................................................... azimuth with sighting device.
Autocollimation ....................................................................................... When an alinement scope is focused on a
............................................................................................................... reflecting surface so that the reflecting
............................................................................................................... image of the reticle is in register with its
............................................................................................................... reticle pattern.
Autoreflection.......................................................................................... When an alinement scope is focused to reveal
............................................................................................................... the image of the autoreflection target and
............................................................................................................... this is made to register with the reticle
............................................................................................................... pattern.
Azimuth................................................................................................... Direction in horizontal plane.
Azimuth Axis ........................................................................................... Vertical axis of bearing and spindle which
............................................................................................................... confines rotation to horizontal plane.
Azimuth, To Turn in................................................................................. To change direction in horizontal plane.
Buck In.................................................................................................... To place an instrument so that line of
............................................................................................................... sight satisfies two requirements (like
............................................................................................................... aiming at two targets) simultaneously.
............................................................................................................... It is usually accomplished by trial
............................................................................................................... and error.
Circular Level (Bullseye) ......................................................................... Round level attached to instrument.
Collimation.............................................................................................. To place an instrument so that the line-of-
............................................................................................................... sight is alined at both a far and near
............................................................................................................... target.
Elevation Axis ......................................................................................... Axis of bearing and journal of telescope
............................................................................................................... axle which confines rotation to vertical
............................................................................................................... plane.
Elevation of Line of Sight ........................................................................ Direction of line of sight in vertical
............................................................................................................... plane.
Focus ...................................................................................................... To move optical part so that sharp image is
............................................................................................................... seen.
Horizontal................................................................................................ Perpendicular to direction of gravity.
Objective Lens ........................................................................................ Lens at front end of telescope.
Glossary 1
