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Pirate radio is illegal or unregulated radio transmission for entertainment or political purposes. While ''pirate'' just refers to the illegal nature of the broadcasts, there have also been notable pirate offshore radio transmissions. Pirate radio generally describes the unlicensed broadcast of FM radio, AM radio, or short wave signals over a wide range. In some cases radio stations are deemed legal where the signal is transmitted, but illegal where the signals are received—especially when the signals cross a national boundary. In other cases, a broadcast may be considered "pirate" due to the nature of its content, its transmission format (especially a failure to transmit a station identification according to regulations), or the transmit power (wattage) of the station, even if the transmission is not technically illegal (such as a web cast or an amateur radio transmission). Pirate radio stations are sometimes called bootleg stations (a term especially associated with two-way radio), clandestine stations (associated with heavily politically motivated operations) or free radio stations. ==Pirate-radio history and examples== Radio "piracy" began with the advent of regulations of the public airwaves in the United States at the dawn of the age of radio. Initially, radio, or wireless as it was more commonly called, was an open field of hobbyists and early inventors and experimenters. The United States Navy began using radio for time signals and weather reports on the east coast of the United States in the 1890s. Before the advent of valve (vacuum tube) technology, early radio enthusiasts used noisy spark-gap transmitters, such as the first spark-gap modulation technology pioneered by the first real audio (rather than telegraph code) radio broadcaster, Charles D. Herrold, in San Jose, California, or the infamous Ruhmkorff coil used by almost all early experimenters. The navy soon began complaining to a sympathetic press that amateurs were disrupting naval transmissions. The May 25, 1907, edition of ''Electrical World'' in an article called "Wireless and Lawless" reported authorities were unable to prevent an amateur from interfering with the operation of a government station at the Washington, D.C. Navy Yard using legal means. In the run-up to the London Radiotelegraph Convention in 1912 (essentially an international gentlemen's agreement on use of the radio band, non-binding and, on the high seas, completely null), and amid concerns about the safety of marine radio following the sinking of the ' on April 15 of that year (although there were never allegations of radio interference in that event), the ''New York Herald'' of April 17, 1912, headlined President William Howard Taft's initiative to regulate the public airwaves in an article titled "President Moves to Stop Mob Rule of Wireless." When the "Act to Regulate Radio Communication" was passed on August 13, 1912, amateurs and experimenters were not banned from broadcasting; rather, amateurs were assigned their own frequency spectrum, and licensing and call-signs were introduced. By regulating the public airwaves, President Taft thus created the legal space for illicit broadcasts to take place. An entire federal agency, the Federal Radio Commission, was formed in 1927 and succeeded in 1934 by the Federal Communications Commission. These agencies would enforce rules on call-signs, assigned frequencies, licensing and acceptable content for broadcast. The Radio Act of 1912 gave the president legal permission to shut down radio stations "in time of war", and during the first two and a half years of World War One, before US entry, President Wilson tasked the US Navy with monitoring US radio stations, nominally to "ensure neutrality." The navy used this authority to shut down amateur radio in the western part of the US (the US was divided into two civilian radio "districts" with corresponding call-signs, beginning with "K" in the west and "W" in the east, in the regulatory measures; the navy was assigned call-signs beginning with "N"). When Wilson declared war on Germany on April 6, 1917, he also issued an executive order closing most radio stations not needed by the US government. The navy took it a step further and declared it was illegal to listen to radio or possess a receiver or transmitter in the US, but there were doubts they had the authority to issue such an order even in war time. The ban on radio was lifted in the US in late 1919. In 1924, New York City station WHN was accused of being an "outlaw station" by the American Telephone and Telegraph Company (AT&T) for violating trade licenses which permitted only AT&T stations to sell airtime on their transmitters. As a result of the AT&T interpretation a landmark case was heard in court, which even prompted comments from Secretary of Commerce Herbert Hoover when he took a public stand in the station's defense. Although AT&T won its case, the furor created was such that those restrictive provisions of the transmitter license were never enforced. In 1948, the United Nations brought into being the Universal Declaration of Human Rights, of which Article 19 states: "Everyone has the right to freedom of opinion and expression; this right includes the freedom to hold opinions without interference and to seek, receive and impart information and ideas through any media and regardless of frontiers." In Europe, Denmark had the first known radio station in the world to broadcast commercial radio from a vessel in international waters without permission from the authorities in the country that it broadcast to (Denmark in this case). The station was named Radio Mercur and began transmission on August 2, 1958. In the Danish newspapers it was soon called a "pirate radio". In the 1960s in the UK, the term referred to not only a perceived unauthorized use of the state-run spectrum by the unlicensed broadcasters but also the risk-taking nature of offshore radio stations that actually operated on anchored ships or marine platforms. The term had been used previously in Britain and the US to describe unlicensed land-based broadcasters and even border blasters (for example, a 1940 British comedy about an unauthorized TV broadcaster, ''Band Waggon'', uses the phrase "pirate station" several times). A good example of this kind of activity was Radio Luxembourg located in the Grand Duchy of Luxembourg. The English language evening broadcasts from Radio Luxembourg were beamed by Luxembourg-licensed transmitters. The audience in the United Kingdom originally listened to their radio sets by permission of a wireless license issued by the British General Post Office (GPO). However, under terms of that wireless licence, it was an offence under the Wireless Telegraphy Act to listen to ''unauthorised'' broadcasts, which possibly included those transmitted by Radio Luxembourg. Therefore, as far as the British authorities were concerned, Radio Luxembourg was a "pirate radio station" and British listeners to the station were breaking the law (although as the term 'unauthorised' was never properly defined it was somewhat of a legal grey area). This did not stop British newspapers from printing programme schedules for the station, or a British weekly magazine aimed at teenage girls, ''Fab 208'', from promoting the DJs and their lifestyle (Radio Luxembourg's wavelength was 208 metres (1439, then 1440 kHz)). Radio Luxembourg was later joined by other well-known pirate stations received in the UK in violation of UK licensing, including Radio Caroline and Radio Atlanta (subsequently Radio Carolines North and South respectively, following their merger and the original ship's relocation) and Radio London, all of which broadcast from vessels anchored outside of territorial limits and were therefore legitimate. Radio Jackie, for instance (although transmitting illegally), was registered for VAT and even had its address and telephone number in local telephone directories. Where actual seafaring vessels are not involved, the term ''pirate radio'' is a political term of convenience as the word "pirate" suggests an illegal venture, regardless of the broadcast's actual legal status. The radio station XERF located at Ciudad Acuña, Coahuila, Mexico, just across the Rio Grande from Del Rio, Texas, US, is an example. While Mexico issued radio station XERF with a license to broadcast, the power of its 250 kW transmitter was far greater than the maximum of 50 kW authorized for commercial use by the government of the United States of America. Consequently, XERF and many other radio stations in Mexico, which sold their broadcasting time to sponsors of English-language commercial and religious programs, were labelled as "border blasters", but not "pirate radio stations", even though the content of many of their programs could not have been aired by a US-regulated broadcaster. Predecessors to XERF, for instance, had originally broadcast in Kansas, advocating "goat-gland surgery" for improved masculinity, but moved to Mexico to evade US laws about advertising medical treatments, particularly unproven ones. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「pirate radio」の詳細全文を読む スポンサード リンク
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