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26 relations: Aircraft emergency frequency, Amateur radio, Belgium, Circular sector, Cycle per second, Distress signal, Global Maritime Distress and Safety System, Hertz, International Amateur Radio Union, International distress frequency, Mayday, Morse code, Navtex, New Zealand, New Zealand Association of Radio Transmitters, Norway, Q code, Radio Act of 1912, Radio propagation, Sinking of the RMS Titanic, SOS, Spark-gap transmitter, United States Coast Guard, Wavelength, 2182 kHz, 630-meter band.
Aircraft emergency frequency
The aircraft emergency frequency (also known as GUARD) is a frequency used on the aircraft band reserved for emergency communications for aircraft in distress.
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Amateur radio
Amateur radio, also known as ham radio, describes the use of radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communication.
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Belgium
Belgium, officially the Kingdom of Belgium, is a country in Western Europe bordered by France, the Netherlands, Germany and Luxembourg.
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Circular sector
A circular sector or circle sector (symbol: ⌔), is the portion of a disk enclosed by two radii and an arc, where the smaller area is known as the minor sector and the larger being the major sector.
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Cycle per second
The cycle per second was a once-common English name for the unit of frequency now known as the hertz.
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Distress signal
A distress signal or distress call is an internationally recognized means for obtaining help.
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Global Maritime Distress and Safety System
The Global Maritime Distress and Safety System (GMDSS) is an internationally agreed-upon set of safety procedures, types of equipment, and communication protocols used to increase safety and make it easier to rescue distressed ships, boats and aircraft.
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Hertz
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.
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International Amateur Radio Union
The International Amateur Radio Union (IARU) is an international confederation of national amateur radio organisations that allows a forum for common matters of concern and collectively represents matters to the International Telecommunication Union (ITU).
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International distress frequency
An international distress frequency is a radio frequency that is designated for emergency communication by international agreement.
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Mayday
Mayday is an emergency procedure word used internationally as a distress signal in voice-procedure radio communications.
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Morse code
Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment.
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Navtex
Navtex (Navigational Telex) is an international automated medium frequency direct-printing service for delivery of navigational and meteorological warnings and forecasts, as well as urgent maritime safety information to ships.
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New Zealand
New Zealand (Aotearoa) is a sovereign island country in the southwestern Pacific Ocean.
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New Zealand Association of Radio Transmitters
The New Zealand Association of Radio Transmitters (NZART) is a non-profit organisation of amateur radio enthusiasts in New Zealand.
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Norway
Norway (Norwegian: (Bokmål) or (Nynorsk); Norga), officially the Kingdom of Norway, is a unitary sovereign state whose territory comprises the western portion of the Scandinavian Peninsula plus the remote island of Jan Mayen and the archipelago of Svalbard.
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Q code
The Q code is a standardized collection of three-letter codes all of which start with the letter "Q".
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Radio Act of 1912
The Radio Act of 1912 is a United States federal law that mandated that all radio stations in the United States be licensed by the federal government, as well as mandating that seagoing vessels continuously monitor distress frequencies.
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Radio propagation
Radio propagation is the behavior of radio waves as they travel, or are propagated, from one point to another, or into various parts of the atmosphere.
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Sinking of the RMS Titanic
sank in the early morning of 15 April 1912 in the North Atlantic Ocean, four days into the ship's maiden voyage from Southampton to New York City.
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SOS
is the International Morse code distress signal; the bar over it indicates to omit the normal gaps between the letters.
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Spark-gap transmitter
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.
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United States Coast Guard
The United States Coast Guard (USCG) is a branch of the United States Armed Forces and one of the country's seven uniformed services.
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Wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
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2182 kHz
The radio frequency 2182 kHz is one of the international calling and distress frequencies for maritime radiocommunication in a frequency band allocated to the mobile service on primary basis, exclusively for distress and calling operations.
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630-meter band
The 630 meter (or 600 meter) amateur radio band is a frequency band allocated by the International Telecommunication Union (ITU) to amateur radio operators, and it ranges from 472 to 479 kHz, or equivalently 625.9 to 635.1 meters wavelength.
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Redirects here:
500 KHz, 500 kc, 500kHz, 600 meter band, 600m band, Auto alarm.
References
[1] https://en.wikipedia.org/wiki/500_kHz
