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Unertl Optical Company. Unertl Optical Company, Inc. was a manufacturer of telescopic sights in the United States from 1928 until 2008. They are known for their 10× fixed-power scopes that were used on the Marine Corps ' M40 rifle and made famous by Marine Corps Scout Sniper Carlos Hathcock during the Vietnam War.
Amateur radio users in the U.S. and Canada have used the R-S-T system since 1934. This system was developed by amateur radio operator Arthur W. Braaten, W2BSR. It reports the readability on a scale of 1 to 5, the signal strength on a scale of 1 to 9, and the tone of the Morse code continuous wave signal on a scale of 1 to 9.
The R-S-T system is used by amateur radio operators, shortwave listeners, and other radio hobbyists to exchange information about the quality of a radio signal being received. The code is a three digit number, with one digit each for conveying an assessment of the signal's readability, strength, and tone. [1] [2] The code was developed in 1934 ...
Police code. A police code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or ...
L44A1 7.62mm Machine Gun (Royal Navy L7 variant fitted with L1A1 Safety Unit and No. 1 Mk 1 Electrical Firing Unit, normally pintle-mounted or set in remote gun pods) [24] L45. L45A1 7.62mm Drill Machine Gun (Drill purpose version of L7) L46. L46A1 7.62mm Drill Machine Gun (Drill purpose version of L7) L47.
The ZF41 was the first attempt to provide the ordinary infantryman with a rifle capable of being used, if not for pure sniping, then at least for sharpshooting. It was initially planned to equip most combat units with the ZF41 scopes, but only 6% of German weapons production could fit the sight. Though useful for sharpshooting with normal ...
X code, used by European military services as a wireless telegraphy code in the 1930s and 1940s; Z code, also used in the early days of radiotelegraph communication. Other. Morse code, is commonly used in Amateur radio. Morse code abbreviations are a type of brevity code. Procedure words used in radiotelephony procedure, are a type of radio code.
President Joe Biden is set to visit the American cemetery outside Paris honoring World War I dead on Sunday, setting up a contrast with former President Donald Trump, who skipped a visit to the ...