Examples of Utility Station and Modes
One common use of utility stations is disseminating weather information. Weather information is often broadcast using RTTY and sending synoptic codes, or weather charts are sent using radiofax, which are used by mariners and others. Airports make voice weather broadcasts on HF, known as VOLMET. Some examples include New York Radio, which broadcasts weather information for locations in the eastern United States, or Shanwick Radio, which does the same for Europe.
HF frequencies are still often used for trans-oceanic air traffic control. News agencies previously used RTTY for news stories, and, less commonly, radiofax for the images, although is no longer done. Satellite communications and the Internet have replaced HF for this application.
Many maritime radio services are often known as utility stations, including as ship-to-shore and vice-versa telephony and error-controlled radioteletype such as SITOR.
Military use of shortwave is also common, but nearly all transmissions are encrypted, with voice encrypted using modes such as ANDVT. Data transmission may make use of encrypted RTTY, use Link-11 for radar tracking data, or use of Automatic link establishment modes to set up communication links automatically.
Some utility stations are on other frequency bands, including NOAA Weather Radio, traveler information stations, and the like; other utility-type signals are piggybacked on FM broadcast subcarriers.
Read more about this topic: Utility Station
Famous quotes containing the words examples of, examples, utility, station and/or modes:
“There are many examples of women that have excelled in learning, and even in war, but this is no reason we should bring ‘em all up to Latin and Greek or else military discipline, instead of needle-work and housewifry.”
—Bernard Mandeville (1670–1733)
“It is hardly to be believed how spiritual reflections when mixed with a little physics can hold people’s attention and give them a livelier idea of God than do the often ill-applied examples of his wrath.”
—G.C. (Georg Christoph)
“Moral sensibilities are nowadays at such cross-purposes that to one man a morality is proved by its utility, while to another its utility refutes it.”
—Friedrich Nietzsche (1844–1900)
“With boys you always know where you stand. Right in the path of a hurricane. It’s all there. The fruit flies hovering over their waste can, the hamster trying to escape to cleaner air, the bedrooms decorated in Early Bus Station Restroom.”
—Erma Bombeck (20th century)
“There are two modes of transport in Los Angeles: car and ambulance. Visitors who wish to remain inconspicuous are advised to choose the latter”
—Fran Lebowitz (b. 1951)