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The numbers station got its nickname after listeners believed that the "Swedish Rhapsody No. 1" by Hugo Alfvén was being used as the interval signal.Documents subsequently released from Polish intelligence revealed that the signal was produced by a music box manufactured by Reuge (pitched to sound like an ice cream truck) playing the song.
A numbers station is a shortwave radio station characterized by broadcasts of formatted numbers, which are believed to be addressed to intelligence officers operating in foreign countries. [1] Most identified stations use speech synthesis to vocalize numbers, although digital modes such as phase-shift keying and frequency-shift keying , as well ...
The Warsaw Pact Early Warning Indicator Project was a highly classified US and Allied program designed to gather intelligence that would provide indicators of impending Soviet nuclear attacks before they occurred. [1] It was the American analogue to Operation RYAN. The project aimed to observe and find ways to prevent conflicts with the Soviet ...
THROWOFF/2: Albanian ethnic agent/radio operator employed by Italian Navy Intelligence/CIA in several early Cold War covert operations against Albania. Was captured, operated radio under communist control to lure CIA agents to capture/death, tried in 1954, death sentence commuted, freed after 25 years. CIA paid his son $40,000 in 1996. [77]
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However, after the Cold War, the number of numbers stations greatly decreased. [8] The Lincolnshire Poacher remained operating after the end of the Cold War, and continued to be broadcast into the next two decades. [4] Akrotiri, Cyprus, the believed location of the Lincolnshire Poacher's broadcasts and radio antennas.
The military services formed a "Joint Operating Plan" to cover 1946-1949, but this had its disadvantages. The situation became a good deal more complex with the passage of the National Security Act of 1947, which created a separate Air Force and Central Intelligence Agency, as well as unifying the military services under a Secretary of Defense.
During World War I, British secret services were divided into numbered sections named Military Intelligence, department number x, abbreviated to MIx, such as MI1 for information management. The branch, department, section, and sub-section numbers varied through the life of the department; examples include: