Profile: Atlas Instrument Co., Inc. specializes in offering navigational instruments. We have the unique capability to manufacture, repair, overhaul, collimate and calibrate a wide variety of optical, navigational & fire control instruments. We provide newly manufactured navigational instruments and their related repair parts. 2000 series alidades consist of reticule-equipped terrestrial telescope, auxiliary optical system, nitrogen gas-filled housing, and a polarizing filter system. MK series alidades consist of reticule-equipped terrestrial telescope, auxiliary optical system, and nitrogen gas-filled housing.