Coast Radio Station had an important role in the history of wireless radio communication as well as in maritime and war history.
Recent costal radio station provide medical advice services for ships, transmitting meteo messages and navigational warnings (NAV-Notice) on a regular base and all of them do a distress chanel watch (DSC-Watch) on VHF Chanel 16. Not all station monitore 2182 kHzshortwave anymore.
The ITU Radio Regulations (RR) is a basic document of the International Telecommunication Union (ITU) that regulates on law of nations scale radiocommunication services and the utilisation of radio frequencies. It is the supplementation to the ITU Constitution and Convention and in line with the ITU International Telecommunication Regulations (ITR). The ITU RR comprise and regulate the part of the allocated electromagnetic spectrum from 9 kHz to 300 GHz.
SOS is a Morse code distress signal, used internationally, originally established for maritime use. In formal notation SOS is written with an overscore line, to indicate that the Morse code equivalents for the individual letters of "SOS" are transmitted as an unbroken sequence of three dots / three dashes / three dots, with no spaces between the letters. In International Morse Code three dots form the letter "S" and three dashes make the letter "O", so "S O S" became a common way to remember the order of the dots and dashes. IWB, VZE, 3B, and V7 form equivalent sequences, but traditionally SOS is the easiest to remember.
Marine VHF radio is a worldwide system of two way radio transceivers on ships and watercraft used for bidirectional voice communication from ship-to-ship, ship-to-shore, and in certain circumstances ship-to-aircraft. It uses FM channels in the very high frequency (VHF) radio band in the frequency range between 156 and 174 MHz, designated by the International Telecommunication Union as the VHF maritime mobile band. In some countries additional channels are used, such as the L and F channels for leisure and fishing vessels in the Nordic countries. Transmitter power is limited to 25 watts, giving them a range of about 100 kilometres.
Digital selective calling (DSC) is a standard for transmitting predefined digital messages via the medium-frequency (MF), high-frequency (HF) and very-high-frequency (VHF) maritime radio systems. It is a core part of the Global Maritime Distress Safety System (GMDSS).
From early in the 20th century, the radio frequency of 500 kilohertz (500 kHz) was an international calling and distress frequency for Morse code maritime communication. For much of its early history, this frequency was referred to by its equivalent wavelength, 600 meters, or, using the earlier frequency unit name, 500 kilocycles or 500 kc.
A Maritime Mobile Service Identity (MMSI) is effectively a maritime object's international maritime telephone number, a temporarily assigned UID issued by that object's current flag state.
The second International Radiotelegraph Convention met in London, England in 1912. It adopted international maritime radio communication standards that updated the ones approved by the first International Radiotelegraph Convention held in Berlin in 1906. The new Convention was signed on July 5, 1912, and became effective on July 1, 1913.
Inter-satellite service, also known as inter-satellite radiocommunication service, as defined by Article 1.22 of the International Telecommunication Union's (ITU) Radio Regulations (RR), is a radiocommunication service providing links between artificial satellites.
A ship station is a radio station located on board a sea vessel. The ITU Radio Regulations define it as "A mobile station in the maritime mobile service located on board a vessel which is not permanently moored, other than a survival craft station."
Maritime mobile-satellite service is – according to Article 1.29 of the International Telecommunication Union's Radio Regulations (RR) – "A mobile-satellite service in which mobile earth stations are located on board ships; survival craft stations and emergency position-indicating radiobeacon stations may also participate in this service", in addition to serving as navigation systems.
Mobile earth station is – according to Article 1.68 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as "An earth station in the mobile-satellite service intended to be used while in motion or during halts at unspecified points."
A land earth station is – according to Article 1.70 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as "An earth station in the fixed-satellite service or, in some cases, in the mobile-satellite service, located at a specified fixed point or within a specified area on land to provide a feeder link for the mobile-satellite service."
Port operations service is – according to Article 1.30 of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as «A maritime mobile service in or near a port, between coast stations and ship stations, or between ship stations, in which messages are restricted to those relating to the operational handling, the movement and the safety of ships and, in emergency, to the safety of persons. Messages which are of a public correspondence nature shall be excluded from this service.»
Ship earth station is – according to Article 1.78 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as "A mobile earth station in the maritime mobile-satellite service located on board ship."
Land mobile earth station is – according to Article 1.74 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as "A mobile earth station in the land mobile-satellite service capable of surface movement within the geographical limits of a country or continent."
Ship movement service is – according to Article 1.31 of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as «A safety service in the maritime mobile service other than a port operations service, between coast stations and ship stations, or between ship stations, in which messages are restricted to those relating to the movement of ships. Messages which are of a public correspondence nature shall be excluded from this service.»
Coast earth station, also called the coast earth radio station is – according to article 1.76 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as "An earth station in the fixed-satellite service or, in some cases, in the maritime mobile-satellite service, located at a specified fixed point on land to provide a feeder link for the maritime mobile-satellite service." Each radio station shall be classified by the service in which it operates permanently or temporarily.
Base earth station is – according to article 1.72 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as "An earth station in the fixed-satellite service or, in some cases, in the land mobile-satellite service, located at a specified fixed point or within a specified area on land to provide a feeder link for the land mobile-satellite service."
Ship's emergency transmitter is – according to article 1.99 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as «A ship's transmitter to be used exclusively on a distress frequency for distress, urgency or safety purposes.»
Aircraft earth station is – according to Article 1.84 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) – defined as "A mobile earth station in the aeronautical mobile-satellite service located on board an aircraft."
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