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U.S. and British cryptographers had broken some PURPLE traffic well before the attack on Pearl Harbor. However, the PURPLE machines were used only by the Foreign Office to carry diplomatic traffic to its embassies.
The Ministry of Foreign Affairs machine was the "Type B Cipher Machine", codenamed Purple by United States cryptanalysts. The chief designer of Purple was Kazuo Tanabe. His engineers were Masaji Yamamoto and Eikichi Suzuki. Eikichi Suzuki suggested the use of a stepping switch instead of the more troublesome half-rotor switch.
Station HYPO. Station HYPO, also known as Fleet Radio Unit Pacific (FRUPAC), was the United States Navy signals monitoring and cryptographic intelligence unit in Hawaii during World War II. It was one of two major Allied signals intelligence units, called Fleet Radio Units in the Pacific theaters, along with FRUMEL in Melbourne, Australia. [1]
Purple street lights contrast with the red stop lights at the intersection of Hypoluxo and Jog Roads in Palm Beach County. LED lights are made of a blue LED light combined with the yellow phosphor ...
A stop light party, stoplight party, traffic light party or traffic party is a party at which guests wear different colors indicating their relationship -seeking status. [1] While they may be held anytime, anywhere; they are commonly held around Valentine's Day and in areas around colleges and universities. [1]
Purple - Obsolete. Up to around 1940, [1] purple lenses were used rather than red as the "Stop" indication in some yards and derails . In 1952, the Interstate Commerce Commission ruled that purple should no longer be used in the U.S. for that purpose.
The U.S. used the codename Magic for its decrypts from Japanese sources, including the "Purple" cipher. Much of the German cipher traffic was encrypted on the Enigma machine. Used properly, the German military Enigma would have been virtually unbreakable; in practice, shortcomings in operation allowed it to be broken.
Sometimes referred to as purple, magenta lights are primarily used by the National Heavy Vehicle Regulator (NHVR), heavy vehicle enforcement/escort officers of Transport for NSW, Victorian VicRoads and South Australian and Queensland Transport Safety Inspectors.
Color blindness or color vision deficiency ( CVD) is the decreased ability to see color or differences in color. [2] The severity of color blindness ranges from mostly unnoticeable to full absence of color perception. Color blindness is usually an inherited problem or variation in the functionality of one or more of the three classes of cone ...
Chemical traffic light experiment. The chemical traffic light is a color-changing redox reaction that is related to the blue bottle experiment. One of the early formulas consists of glucose, sodium hydroxide, indigo carmine (dye), and water.