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Cammenga lensatic compass The M-1950 U.S. military lensatic field compass with self-luminous lighting (designated the Model 3H by Cammenga) is fitted with self-luminous tritium vial lighting. Under U.S. military specification (MIL-SPEC) performance criteria, ten pre-production samples of the M-1950 are required to meet a battery of performance ...
F14 Compass, lensatic, M1918 – Parts and equipment, 16 September 1927; F15 Machine gun clinometer M1917 Parts and equipment; F16 Sight, panoramic, machine gun, M1918 – Parts and equipment; F17 Device, aiming, mirror, M1918 – Parts and equipment, 23 November 1926; F18 Night lighting device, parts and equipment; F19 Board, deflection, M1; F20
The lull between World War I and World War II reduced center operations to mostly reconditioning and sale of the stockpiles which had been needed earlier to ensure the nations defense. During World War II the center became the largest military supply installation in the world. In December 1942, an additional 295 acres (1.19 km 2) were purchased ...
As William Ainsworth Inc., production of the Pocket Transit continued; the same basic design remains in production today, in numerous versions and configurations.. In 1970, the company introduced the Brunton Cadet, a simplified evolution of the Pocket Transit incorporating a compass and clinometer, intended for use in training students in the fields of geology, forestry, mining, and surveying. [9]
A Brunton compass, properly known as the Brunton Pocket Transit, is a precision compass made by Brunton, Inc. of Riverton, Wyoming. The instrument was patented in 1894 by Canadian-born geologist David W. Brunton. [ 1 ]
Some military compasses, like the U.S. M-1950 (Cammenga 3H) military lensatic compass, the Silva 4b Militaire, and the Suunto M-5N(T) contain the radioactive material tritium (3 1 H) and a combination of phosphors. [26] The U.S. M-1950 equipped with self-luminous lighting contains 120 mCi (millicuries) of tritium.
What is a "lensatic" compass? This should be added to the article. A lensatic compass has a lense (typically in the sight) so that when held to the eye to take a bearing you can read the dial. This is typically a military style field compass. If you get one maybe you could take a phot of it for the article. Billlion 05:45, 31 May 2005 (UTC)
Floating-card compass with prismatic sight (bearing 220° through eyepiece). The marine hand compass, or hand bearing compass|hand-bearing compass as it is termed in nautical use, has been used by small-boat or inshore sailors since at least the 1920s to keep a running course or to record precise bearings to landmarks on shore in order to determine position via the resection technique.
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