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The transmission of radio messages had the potential risks of revealing the submarine's presence and direction; if decoded the content was also revealed. Submarines need to provide information, mostly in standard form (position of convoy to attack and of submarine, weather information), to their
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on 9 May 1941. In August 1941, Dönitz began addressing U-boats by the names of their commanders, instead of boat numbers. The method of defining U-boat meeting points in the Short Signal Book was regarded as compromised, so a method was defined by
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code was intended to shorten transmission time to below the time required to get a directional fix. It was not primarily intended to hide signal contents; protection was intended to be achieved by encoding with the Enigma machine. A copy of the
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was then encoded with the Enigma machine and subsequently transmitted as rapidly as possible, typically taking about 20 seconds. Typical length of an information or weather signal was about 25 characters.
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code system condensed messages into short codes consisting of short sequences for common terms such as "convoy location" so that additional descriptions would not be needed in the message. The resulting
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bases. Initially Morse code transmissions could be used. To inhibit detection, the duration of messages needed to be minimised; for this,
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Conventional RDF needed about a minute to fix the bearing of a radio signal, and the
Kurzsignale protected against this. However, the
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and, if deployed, would have been a serious setback for Allied anti-submarine and code-breaking activities. By late 1944 the
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in not more than 460 milliseconds; this was short enough to prevent location even by
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short-coding was used. To prevent interception, messages needed to be encrypted by the
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program was a top priority, but the war ended before the system was operational.
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system which was in use by the Allies could cope with these short transmissions.
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Seizing the Enigma – The Race to Break the German U-Boat codes 1939–1943
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The short signal booklet was printed with water-soluble red ink on pink
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A similar coding system was used for weather reports from U-boats, the
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Battle of Wits: The
Complete Story of Codebreaking in World War II
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61:, in order to be able to destroy it quickly in case of danger.
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Code system used by the German Navy during World War II
183:(Short Weather Cipher). Code books were captured from
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developed various systems to speed up broadcast. The
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276:Aircraft of World War II: thread August 19, 1942
110:to disguise their positions on the Kriegsmarine
351:Military history of Germany during World War II
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157:, in testing from August 1944, could send a
356:World War II military equipment of Germany
336:History of telecommunications in Germany
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37:), was a short code system used by the
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216:: Naval Institute Press. p. 237.
295:. New York, NY: Free Press. pp.
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341:Signals intelligence of World War II
346:Military communications of Germany
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122:Aware of the danger presented by
239:"Kurzsignale on German U-boats"
243:Cipher Machines and Cryptology
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95:code book was captured from
287:Budiansky, Stephen (2000).
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261:: CS1 maint: postscript (
112:German Naval Grid System
124:radio direction finding
118:Radio direction finding
97:German submarine
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41:(German Navy) during
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173:Short Weather cipher
150:The fully automated
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180:WetterkurzschlĂĽssel
237:Rijmenants, Dirk.
152:burst transmission
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306:978-0-684-85932-3
223:978-1-59114-807-4
82:Short Signal book
27:Short Signal Book
23:Short Signal Code
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206:Kahn, David
132:Kurzsignale
126:(RDF), the
93:Kurzsignale
88:Kurzsignale
68:Kurzsignale
49:Description
320:Categories
248:2016-11-21
193:References
159:Kurzsignal
137:Kurzsignal
214:Annapolis
163:huff-duff
145:huff-duff
257:cite web
105:B-Dienst
297:341–343
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167:Kurier
31:German
186:U-559
99:U-110
301:ISBN
263:link
218:ISBN
86:The
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