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OP-20-G - Wikipedia
OP-20-G or "Office of Chief Of Naval Operations (OPNAV), 20th Division of the Office of Naval Communications, G Section / Communications Security", was the U.S. Navy's signals intelligence and cryptanalysis group during World War II. Its mission was to intercept, decrypt, and analyze naval communications from Japanese, … 展开
The Code and Signal Section was formally made a part of the Division of Naval Communications (DNC), as Op-20-G, on July 1, 1922. In January … 展开
In February 1942 power struggles within the Navy resulted in the sidelining of Laurance Safford, with the support of Admirals 展开
• Andrew Gleason, one of the OP-20-G members during World War II
• Fleet Radio Unit
• United States Naval Computing Machine Laboratory
• US Army SIS 展开• "The Pacific War: The U.S. Navy, Naval Intelligence as of Pearl Harbor". Retrieved 2006-12-07.
• "The National Archives: Records of the National Security Agency/Central Security Service". Retrieved 2006-12-07. 展开In the early hours of the morning of 7 December 1941, the U.S. Navy communications intercept station at Fort Ward on Bainbridge Island, Washington, picked up a radio … 展开
• (July 1922-March 1935) Code and Signal Section (Op-20-G), Division of Naval Communications (DNC), OCNO (July 1922-March 1935).
• (March 1935-March 1939) Communications Security Group (Op-20-G), DNC, OCNO 展开• Budiansky, Stephen (2000). Battle of Wits: The Complete Story of Codebreaking in World War II. New York: Free Press. 展开
CC-BY-SA 许可证中的维基百科文本 On-the-Roof Gang: The U.S. Navy’s Cryptologic Pioneers
Navy Cryptology: The Early Days > National Security …
String Quartets, Op. 20 (Haydn) - Wikipedia
OP-20-G — Wikipédia
La mission de l'OP-20-G est l'interception, le décryptage et l'analyse des transmissions navales allemandes, japonaises et italiennes. En outre, l'OP-20 …
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OP-20-G | Military Wiki | Fandom
Op-20-G - Dayton Codebreakers
History Op-20-G-4E/ late 1945 - Dayton Codebreakers
Naval Security Group Disestablishment :: Information Warfare :: …
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