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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 ...
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.
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 a tape or chain or laser range finder. [2] The compass is generally used to run a traverse line. The compass calculates bearings of lines with respect to magnetic needle.
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. [37] The U.S. M-1950 equipped with self-luminous lighting contains 120 mCi (millicuries) of tritium.
The M-1956 LCE continued application of the belt-supported-by-suspenders concept, adopted by the U.S. Army at least as early as the pattern 1903 equipment. [2] The M-1956 "Belt, Individual Equipment" or pistol belt differed little in form and function from the M-1936 pistol belt and would accommodate any of the pouches and equipment that would mount on the M-1936 belt.
Full Compass Systems is an American retailer of professional audio, professional video, lighting equipment and musical instruments. The company offers more than 100,000 products through 800 manufacturer brands, and it is an authorized service center and parts distributor for many.
A beam compass and a regular compass Using a compass A compass with an extension accessory for larger circles A bow compass capable of drawing the smallest possible circles. A compass, also commonly known as a pair of compasses, is a technical drawing instrument that can be used for inscribing circles or arcs.
The compass can have an arbitrarily large radius with no markings on it (unlike certain real-world compasses). Circles and circular arcs can be drawn starting from two given points: the centre and a point on the circle. The compass may or may not collapse (i.e. fold after being taken off the page, erasing its 'stored' radius).
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