Prismatic Magnetic Military Compass (Green) One of the most advance, accurate and easy to use unit. Enables you to take quick and accurate readings, giving you the speed and precision. Consists of a metal housing, and a metal/plastic lid with a glass window with the sighting line etched into it. Make accuracy in readings easy to obtain. The Prismatic compass is provided with an integrated Spirit-LEVEL which can be screwed on a tripod by means of a threaded fitting in its base, and serve as theodolite, for simple terrain surveys. ... Free shipping with tracking. Thank you for visiting eTreasures.