20-8355

Surveying theodolite

20-8355 Description

Telemetering theodolite , preseason measuring system used by the faa for calibration of instrument landing system (ils) , mls, vor, tacan, vortac, .

Features

Prescison measuring system used by the faa for calibration of instrument landing system (ils), mls, vor, tacan, vortac, and other navigational aids. In ils calibration, an operator tracks the flight check aircraft and adjusts the theodolite so that the image remains in the crosshairs.

Properties of 20-8355

Part Name Assigned By Controlling Agency:
Telemetering theodolite
NSN:
6675-01-559-7329
Description:
Theodolite,surveying
Cage Code:

Definition Surveying Theodolite

A precision telescopic instrument used in topographic and geodetic surveying or precise alignment operations. Generally, the optical systems for reading the horizontal and vertical circles are fully inclosed. The reading of the circles is made through optical micrometers. Some optical systems are so designed that readings of diametrically opposite points of the circles are mechanically averaged. The instruments are leveled by three leveling screws. Internal illumination may be provided for reading the circles and viewing the reticle crosslines. Excludes transit and transit, pocket.

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Last modified 05/18/2024