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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.
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.
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It is also curious and questionable that no one mentioned the use of the Chinese dry suspension compass as early as the 12th century, and blatantly wrote that the only compass known in China before European influence was the wet compass placed in a bowl of water. To this I say: hogwash.--PericlesofAthens 22:15, 27 May 2007 (UTC)
A video shared by the command shows planes taking off and rockets being launched from a ship. The targets included a Houthi command and control facility and advanced conventional weapon production ...
CHICAGO (CBS) -- Former Chicago White Sox and Philadelphia Phillies slugger Dick Allen got the call for the National Baseball Hall of Fame Sunday, following a vote by the Classic Baseball Era ...
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.
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