TM 9-1595 Ordnance Maintenance: Prismatic Compass, M1918 1941-07-17
TM Ordnance Maintenance: Prismatic Compass, M "The prismatic compass is a multiple-purpose instrument for obtaining clinometer, angle of site, and magnetic azimuth readings. It may be used with mm howitzers, M, M and modifications; mm guns, M, MA2, M and modifications; mm pack howitzers, Ml Pages: PRISMATIC COMPASS, M e. The clinometer wedge knob, A, when fully depressed clamps the clinometer dial against rotation, and when partially depressed acts as a brake for damping. /. The plane supporting surface of the case support, B, is parallel to the line of sight passing through the front and rear sights. A prismatic compass is a navigation and surveying instrument which is extensively used to find out the bearing of the traversing and included angles between them, waypoints (an endpoint of the lcourse) and direction. Compass surveying is a type of surveying in which the directions of surveying lines are determined with a magnetic compass, and the length of the surveying lines are measured with. TM Ordnance Maintenance Prismatic Compass, M TM E German Volkswagen TM Handbook on German Forces TM Heavy Tanks M6 and M6A1 TM Light Tank M3 TM MM Gun M3 Mounted in Combat Vehicles TM 9 Author: BACM Research.
The M Compass, Prismatic has a similar design to the early Lensatic Compass but its cylindrical case stands higher and is not squared off with a ruler edge like the later lensatic compass models, it has some type of liquid inside. The compass was used by officers and technical staff, and was not issued in large numbers to enlisted men. Prismatic Compass, M (17 July ). Another type of compass in widespread use was the Escape and Survival Compass. This was a small, concealable button compass that was inaccurate but better than nothing. A typical survival compass, packed with a map set, was brass with black enamel paint, about one-half inch in diameter. Ordnance Maintenance Gunner's Quadrants M1 and M TM Ordnance Maintenance Prismatic Compass, M TM Ordnance Maintenance Field Glass, Type EE: TM Ordnance Maintenance Chassis and Body for Scout Cars M3A1: TM Ordance Maintenance Power Train (Axles, Transmission, and Propeller Shaft. The lensatic compass is a very common style because of its accuracy and its many uses. The Cammenga 3HCS has mil markings for military applications and degree markings for orientation and normal land navigation. Since it has a magnifying lense on the rear sight, you can use the compass-to-cheek method (where you lower the lid onto the rear.
In many publications and online resources the M Lensatic Compass is commonly referred to as the M prismatic compass and sometimes lensatic compass. I'm not sure where this nomenclature originated as the compass shown online and in the many books is clearly not a prismatic compass . AOFAR AF-5C Orienteering Compass for Hiking, Boy Scout Compass for Kids - Professional Field Compass for Map Reading,Navigation and Survival Lightweight - Mini Camping Compass . Make Offer - WWI US Army Engineer Corps Cruchon & Emons Berne Brass Military Compass Vintage WWI Cruchon and Emons Berne US Engineer Corps Brass Compass Original $ 6d 1h. Ordnance Maintenance Prismatic Compass, M TM Ordnance Maintenance Compass M2 * TM Ordnance Maintenance Field Glass, Type EE * TM Ordnance Maintenance Chassis and Body for Scout Cars M3A1 * TM Ordance Maintenance Power Train (Axles, Transmission, and Propeller Shaft) for Half-Track Vehicles *.