GB/T 16162-1996 Global Maritime Distress and Safety System (GMDSS) Terminology
Some standard content:
National Standard of the People's Republic of China
GB/T16162—1996
Terms for global maritime distress and safety system1996-01-25Promulgated
State Administration of Technical Supervision
Implementation on 1996-10-01
National Standard of the People's Republic of China
Terms for global maritime distress and safety system1 Subject Content and Scope of Application
This standard specifies the basic terms of the Global Maritime Distress and Safety System (GMDSS). This standard is applicable to the preparation of maritime communication standards, as well as to the preparation of teaching materials, books and technical documents. 2 Basic Concepts
2.1 International Maritime OrganizationInternational Maritime Organization, IMoGB/T16162—1996
Specialized agency within the United Nations system responsible for maritime technical issues, maritime safety of various countries, ship pollution prevention and its legal issues. 2.2 International Maritime Satellite Organization (INMARSAT) is an organization established by the International Maritime Satellite Organization Convention adopted on September 3, 1976. 2.3 Global Maritime Distress and Safety System (GMDSS) is a distress and safety communication system using multiple communication methods proposed by the International Maritime Organization (IMO) to improve global maritime distress and safety communications.
2.4 International Convention for the Safety of Life at Sea, 1974, 1974 SOLAS Convention
A convention on the safety of life at sea adopted by the International Conference on the Safety of Life at Sea on November 1, 1974, also known as the SOLAS Convention.
2.5Amendments to the 1974 SOLAS Convention in 1988
refers to the amendments to Chapter IV of the 1974 SOLAS Convention adopted by the International Maritime Organization (IMO) at the SOLAS Contracting Parties Conference in November 1988.
2.6International Convention for Maritime Search and Rescue (SAR Convention)
refers to the convention formulated and adopted by the International Maritime Organization at the International Maritime Search and Rescue Conference held in April 1979 to enhance international cooperation in the search and rescue of persons in distress at sea. 2.7 International Convention on Standard of Training, Certification and Watchkeeping for Seafarers, 1978 (STCW) is an international convention formulated to unify the standards of seafarer training, certification and watchkeeping in various countries to ensure the navigation safety of seafaring ships. 2.8 Contracting Government The government of a signatory country to an international convention.
2.9 Radio Regulations Radio Regulations, RR refers to the latest annex to the International Telecommunication Convention in force at any time or the radio regulations regarded as an annex. The regulations are published by the International Telecommunication Union (ITU).
2.10GMDSSareas
Approved by the State Administration of Technical Supervision on January 25, 1996 and implemented on October 1, 1996
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Refers to the scope of the radio communication system used by the Global Maritime Distress and Safety System (GMDSS), and the radio equipment that ships sailing in this scope should be equipped with is determined accordingly. 2.11A1 sea areaA1
The area covered by at least one VHF coast radiotelephone with continuous and effective digital selective calling (DSC) alarm capability, which is specified by the Contracting Governments. 2.12A2 sea areaA2
Except for the A1 sea area, the area covered by at least one MF coast radiotelephone with continuous and effective digital selective calling (DSC) alarm capability, which is specified by the Contracting Governments. 2.13A3 sea areaA3
Except for A1 and A2 sea areas, the area covered by the International Maritime Satellite System (INMARSAT) geostationary satellite with continuous and effective warning capability.
2.14A4 sea areaA4
Refers to the area outside A1, A2 and A3 sea areas.
Ship carriage requirementsshipcarriagerequirementsThe requirements for ships sailing in different sea areas to be equipped with Global Maritime Distress and Safety System (GMDSS) radio communication equipment in accordance with Part C of Chapter IN of the 1988 Amendment to the SOLAS Convention. 2.16Distress alertingThe report of a distress incident sent quickly and successfully to a unit that can provide rescue or coordinate rescue. Search and rescue coordination communicationsSARco-ordinatingcommunications2.17
Communications between the Rescue Coordination Centre (RCC) and ships in distress, ships or aircraft participating in the rescue, and relevant search and rescue units on land.
On-scene communications2.18
Communications between distressed vessels and assistance units, and between assistance units and on-scene commanders. 2.19
On-scene commander
The commander of a rescue unit designated to coordinate surface search and rescue operations within the specified search area. 2.20Positioning
The geographical location of a distressed vessel or survivors in degrees and minutes of latitude and longitude. 2.21
Locating
Refers to searching for vessels, aircraft, offshore facilities or persons in distress. 2.22
Maritime safety informationMaritime safety information, MSI, navigational warnings, weather warnings, weather forecasts and other urgent information related to safety broadcast to ships. 2.23general radio communicationsGeneral radio communicationsPublic communications and ship operation communications other than distress, emergency and safety communications conducted by radio. Bridge-to-bridge communication Bridge-to-bridge communication 2.24 Safety communication between ships from the normal driving position of the ship. 2.25 Duplication of equipment method Duplication of equipment, according to the maintenance requirements stipulated in Article 15 of Chapter NV of the 1988 Amendment to the SOLAS Convention, in order to ensure the availability of communication equipment on board ships, a method of duplication of equipment is required for certain equipment. 2.26 Shore-based maintenance method Shore-based maintenance According to the maintenance requirements stipulated in Article 15 of Chapter N of the 1988 Amendment to the SOLAS Convention, in order to ensure the availability of communication equipment on board ships, a method of shore-based maintenance is adopted. 2.27 Electronic maintenance method at sea According to the maintenance requirements stipulated in Article 15 of Chapter N of the 1988 Amendment to the SOLAS Convention, in order to ensure the availability of communication equipment on board ships, a method of on-board maintenance is adopted. 2.28 Coordinated Universal Time (UTC) is a time scale based on seconds, which is stipulated and recommended by the former International Radio Consultative Committee (CCIR) and maintained by the International Time Bureau.
2.29 Ship reporting system ship reporting system is based on the 1979 International Convention on Maritime Search and Rescue and the International Maritime Organization (IMO) A.Resolution 598(15) states that each Contracting Government shall establish a system for all ships of the nationality of which within the search and rescue region for which they are responsible to report regularly and in a prescribed form to the competent authority. 2.30 Automated Mutual-Assistance Vessel Rescue System, AMVER is a voluntary international maritime merchant ship reporting system operated by the United States Coast Guard. Australian Ship Reporting System, AUSREP 2.31 is a mandatory ship reporting system in a defined maritime area operated by the Canberra Maritime Rescue Co-ordination Centre in Australia. 2.32 Continuous Watch means a radio watch which should not be interrupted except for brief intervals caused by the vessel's own communications being weakened or blocked or when the equipment is undergoing scheduled maintenance or inspection.
3 Satellite Communications
3.1 Space Radio Communications Space Radio Communications Any radio communication carried out by one or more reflecting satellites or other objects in space, including the use of one or more space stations or the use of a - communication.
3.2 Space systemspacesystem
A group of earth stations and/or space stations that jointly conduct space radio communications for a specific purpose. 3.3 Satellite systemsatellitesystem
A space system using one or more artificial earth satellites. 3.4 Satellite networksatellitenetwork
A part of a satellite system or health system consisting of a satellite and multiple earth stations cooperating with it. 3.5 Satellite linksatellite link
A radio link established between a transmitting earth station and a receiving earth station through a satellite. A satellite link consists of an uplink and a downlink.
3.6 Multi-satellite linkmulti-satellitelinkA radio link established between a transmitting earth station and a receiving earth station through two or more satellites without passing through any other intermediate earth stations. A multi-satellite link consists of an uplink, one or more satellite-to-satellite links and a downlink. 3.7 Feeder link feederlink
A radio link between an earth station located at a given location and a space station, used to transmit information of space radiocommunication services other than fixed-satellite services. The given location can be a fixed location or any fixed location within a specified area. 3.8 Active satellite activesatellite
A satellite used to transmit or forward radiocommunication signals. 3.9 Reflecting satellite reflectingsatellite A satellite used to reflect radiocommunication signals. 3.10 Geostationary satellite geostationarysatellite A geosynchronous satellite whose circular and prograde orbit is located in the equatorial plane of the earth and remains stationary relative to the earth. It also refers to a satellite that remains roughly stationary relative to the earth.
3.11 Geostationary satellite orbit geostationarysatelliteorbit A satellite orbit whose orbital plane coincides with the equatorial plane and whose operating period is 24 hours. 3
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3.12 International Maritime Satellite System, INMARSATsystem A system controlled and managed by the International Maritime Satellite Organization (INMARSAT) for navigation, aviation and land mobile satellite communications. 3.13 International Maritime Satellite A System INMARSAT-Asystem An international maritime satellite communication system that uses both digital and analog technologies. The system can provide telephone, user telex, fax communication services, as well as distress alerts and distress and safety communication services. International Maritime Satellite B System INMARSAT-Bsystem3.14
An international maritime satellite communication system that uses digital technology. The system not only has the functions of the International Maritime Satellite A system, but can also access more advanced and complete data networks. 3.15 International Maritime Satellite C System INMARSAT-Csystem An international maritime satellite communication system that can process digital information. The system can use the store-and-forward method for user telegraph communication, data communication, enhanced group calling function, distress alarm and communication function, but does not have telephone communication function. 3.16 International Maritime Satellite E System INMARSAT-E system refers to the L-band satellite emergency position-indicating radio beacon (EPIRB) system. The satellite emergency position-indicating radio beacon (EPIRB) sends distress alarm information containing the distress position to the rescue coordination center on the shore through the satellite in any of the four ocean areas. 3.17 L-band satellite emergency position-indicating radio beacon L-band EPIRB operates as a satellite emergency radio beacon in the 1.6GHz frequency band through the geostationary space segment T of the International Maritime Satellite System (INMARSAT).
3.18 Enhanced Group Call System Enhanced Group Call system, EGC system is a system that broadcasts through the mobile communication satellite of the International Maritime Satellite System (INMARSAT). The enhanced group call system is a component of the INMARSAT-C system and supports two services: "safety communication network" and "fleet communication network". 3.19 Ocean regions oceanregions
The regions covered by the four geostationary satellites of the International Maritime Satellite System (INMARSAT), namely the Atlantic East Region, the Atlantic West Region, the Pacific Region and the Indian Ocean Region.
Atlantic East Region AtlanticOceanRegionEast, AOR-E3.20
The ocean region covered by the satellite of the International Maritime Satellite System (INMARSAT) in the eastern Atlantic Ocean. 1 Atlantic West Region AtlanticOceanRegionWest, AoR-W3.21
The ocean region covered by the satellite of the International Maritime Satellite System (INMARSAT) in the western Atlantic Ocean. 2 Pacific OceanRegionPacificOceanRegion, POR3.22
The ocean region covered by the satellite of the International Maritime Satellite System (INMARSAT) in the Pacific Ocean. 3.23 Indian Ocean Region IndianOceanRegion, IORThe ocean region covered by the satellite of the International Maritime Satellite System (INMARSAT) in the Indian Ocean. 3.24 Space segment spacesegment
Working satellites and spare satellites managed by the International Maritime Satellite Organization (INMARSAT). 3.25 Network control centre networkcontrolcentre, NCC refers to the system operation management department located at the headquarters of the International Maritime Satellite Organization (INMARSAT) responsible for monitoring, coordinating and controlling the operation of all satellites in the International Maritime Satellite Network. 3.26 Network coordination station networkco-ordinationstation, NCS is a land earth station of the International Maritime Satellite System (INMARSAT) responsible for allocating, controlling and monitoring telephone and user telegraph channels between mobile earth stations and land earth stations in the ocean area. The International Maritime Satellite C System (INMARSAT-C) Network Coordination Station is also responsible for broadcasting Enhanced Group Call (EGC) messages on its common channels. 3.27 Earth station earthstation
A radio station located on the surface of the earth or within the main part of the earth's atmosphere, and prepared to communicate with one or more space stations or communicate with one or more similar stations through one or more reflecting satellites or other objects in space. 4
3.28 Space stationspacestation
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A radio station located outside the main part of the Earth's atmosphere or on an object that is about to exceed or has exceeded the main part of the Earth's atmosphere. 3.29 Land earth stationlandearthstation,LESAn earth station located at a designated fixed location or in a designated area on land, providing feeder links for fixed-satellite services or sometimes for mobile-satellite services.
3.30 Coast earth stationcoastearthstation,CESAn earth station located at a designated fixed location on land, providing feeder links for fixed-satellite services or sometimes for mobile-satellite services over seas, referred to as a shore station.
Mobile earth stationmobileearthstation,MESAn earth station in the mobile-satellite service that is used exclusively when moving or staying at a non-designated location. 3.32
Ship earth station, SES is a mobile earth station installed on a ship to engage in satellite mobile services on the sea, referred to as ship station. 3.33 Satellite emergency position-indicating radio beacon, satellite EPIRB is an earth station belonging to the satellite mobile service. Its transmission is to facilitate search and rescue operations. 3.34
International Maritime Satellite Mobile Number INMARSAT mobile number, IMN is the identification number assigned to the mobile earth station by the International Maritime Satellite Organization. 3.35 Maritime distress channel maritime distress channel is a satellite channel of the International Maritime Satellite System (INMARSAT) used between a distressed ship and a coastal earth station in response to a distress priority application message.
3.36 Extravehicular equipment above deck equipment, ADE is the International Maritime Satellite A System (INMARSAT-A) ship earth station equipment installed outside the cabin. Belowdeck equipment, BDE3.37
Inmarsat-A ship earth station equipment installed in the cabin. 3.38 Distress priority The highest priority level in the International Maritime Satellite System (INMARSAT), marked as "priority 3", the system will give priority to allocating channels to ensure the transmission of distress reports.
3.39 Emergency priority The priority level in the International Maritime Satellite System (INMARSAT) that is higher than all other communications except the distress priority, marked as "priority 2".
Safety priority safetypriority
A priority level in the International Maritime Satellite System (INMARSAT) that is lower than the emergency priority, marked as "priority 1". 3.41
routinepriority
The level used for routine communications in the International Maritime Satellite System (INMARSAT), with the priority symbol "priorityO". 3.42Commissioning testA number of tests such as telephone, user telex and distress communications that each type-approved mobile earth station conducts in accordance with the provisions of the International Maritime Satellite Organization before entering the International Maritime Satellite System (INMARSAT). 3.43Network Coordinator Station Common Time Division Multiplexing ChannelNCScommonTDMchannelA channel used for call release, confirmation and sending of polling telecommands and as a frequency reference for all mobile earth stations.Network Coordinator Station to Network Coordinator Station Signaling ChannelNCS/NCSsignallingchannel3.44
A channel used for sending and updating mobile earth station registration tables between oceanic areas in the International Maritime Satellite System (INMARSAT).
3.45 Network Coordinator to Land Earth Station Signaling Channel NCS/LESsignallingchannel Channel 5 in the International Maritime Satellite System (INMARSAT) for transmitting network working status information between land earth stations and network coordinator stations.
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Land Earth Station Time Division Multiplexing Channel LESTDMchannel3.46
Channel used for control and sending shore-to-ship messages in the International Maritime Satellite System (INMARSAT). Mobile Earth Station Signaling Channel MESsignallingchannel3.47
Channel used in the International Maritime Satellite System (INMARSAT) for sending control, signaling and data report packets to land earth stations. Mobile Earth Station Message Channel MESmessagechannel3.48
Channel used in the International Maritime Satellite System (INMARSAT) for sending pre-edited information in the ship-to-shore direction. 3.49
channel modelchannelmodel
In the International Maritime Satellite System (INMARSAT), a mathematical model used to simulate the attenuation effect of maritime satellite channels caused by multipath propagation.
Closed networkclosednetworkbZxz.net
A dedicated communication network for use by only a group of registered users. 3.51
Closed user groupclosedusergroup
To simplify the address information of data reporting and polling services, users outside a group of users who communicate with each other cannot enter the closed network.
3.52Public switching telephone networkpublic switching telephone network, PSTN refers to the network for mobile earth stations to communicate with computers or e-mail devices that can connect to the international public switching telephone network. 3.53
packet data switching networkpackets switching data network, PSDN refers to the network for mobile earth stations to communicate with computers or e-mail devices that can connect to the international packet data switching network, also known as X.25 communication network.
3.54 Data report datareport
In the International Maritime Satellite C system (INMARSAT-C), a short packet of data sent in bursts on the mobile earth station signaling channel initiated by a polling telecommand or by the mobile earth station operator. 3.55 Data circuit terminal datacircuitterminating equipment, DCE is located at both ends of the data line and can provide all functions for establishing, maintaining and terminating line connections. The equipment also transfers all signal conversions and encodings between the data terminal equipment and the link. 3.56 Data terminal equipment dataterminalequipment, DTE equipment at the beginning or end of the communication line, such as keyboards, displays and user telegraph printers. Externally mounted equipment, EME3.57
Internally mounted equipment of the International Maritime Satellite C system (INMARSAT-C) mobile earth station installed outside the cabin. 3.58 Internally mounted equipment, IME International Maritime Satellite C system (INMARSAT-C) mobile earth station equipment installed inside the cabin. 3.59 Enhanced group call service code enhanced group call service code, EGC service code In the International Maritime Satellite C system (INMARSAT-C), the service type code used to indicate the type of message and the method of broadcasting the address adopted.
3.60 Mobile earth station status mobile earth station status, MES status refers to the working status of the mobile earth station in the International Maritime Satellite C system (INMARSAT-C) ocean area being idle, busy or not in the ocean area.
3.61 Open network open network
Refers to the public communication network.
packet switching packets switching
A method of sending messages by dividing a complete message into multiple groups for transmission, and restoring the received multiple groups of messages to the original message at the receiving end.
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3.63 Performance verification test performance verification test, PVT In the International Maritime Satellite C system (NMARSAT-C), an automatic test performed by a land earth station on a mobile earth station to verify whether the mobile earth station functions normally and whether its line quality is suitable for reliable communication. 3.64 Polling polling
Refers to the International Maritime Satellite C system (INMARSAT-C) service that polls a selected group of mobile earth stations in turn. After the polled mobile earth station responds in a predetermined manner, it should send a data report message or start sending a ship-to-shore message. 3.65 Signaling packet signaling packet A burst of packets sent on the signaling channel of a mobile earth station. 3.66 Store and forward unit store and forward unit, SFU In the International Maritime Satellite C system (INMARSAT-C), a computer device with additional memory that transmits messages between user telegraph users. This device does not have the function of operating in session mode. 3.67 Enhanced group call receiver EGCreceiver An independent receiving device that meets the requirements of the Global Maritime Distress and Safety System (GMDSS) and is used to receive maritime safety information broadcast by the International Maritime Satellite System (INMARSAT). 3.68 Enhanced group call decoder EGCdecoder A receiving device that meets the requirements of the Global Maritime Distress and Safety System (GMDSS) and can interface with the terminal equipment of the International Maritime Satellite A system ship earth station to receive maritime safety information and distress alerts. 3.69
Electronic data interchange electronic data interchange, EDI A data communication in a standard format between computer terminals in mobile earth stations. Handshake
A check and confirmation between two modems to establish synchronous and reliable communication. Space system for search of distress vessels, CoSPAS 3.71
A low polar orbiting search and rescue satellite system managed by the former Soviet Union to determine the location of distress beacons, which is a component of the Low Polar Orbiting Search and Rescue Satellite System (COSPAS-SARSAT). Satellite search and rescue tracking system search and rescue satellite-aided tracking, SARSAT3.72
A low-polar orbit satellite search and rescue tracking system jointly managed by Canada, France and the United States to determine the location of distress beacons. It is a component of the low-polar orbit search and rescue satellite system COSPAS-SARSAT). 3.73 COSPAS-SARSATsystem is a satellite-aided search and rescue system based on low-altitude near-polar orbit satellites jointly provided by the Space System for Searching Ships in Distress (COSPAS) and the Satellite Search and Rescue Tracking System (SARSAT). It determines the location of distress beacons transmitted on the frequencies of 121.5/243MHz and 406MHz.
4 Local user terminal local user terminal, LUT3.74
Receives distress alarms relayed by the low-polar orbit search and rescue satellite system (COSPAS-SARSATsystem), calculates the location of the beacon, retrieves and checks the coded information, and transmits the above information to the ground receiving station of the Mission Control Center (MCC). 3.75 Mission control centre, MCC A component of the ground system in the COSPAS-SARSAT system. The MCC receives alarm data from the local user terminal (LUT) and distributes the information to the search and rescue contact point or sends it to other mission control centres. The MCC can also exchange alarm data and system information with other MCCs.
3.76 SAR point of contact, SPOC In the COSPAS-SARSAT system, the mission control centre, rescue coordination centre or any other contact point in the country that is responsible for coordinating the rapid and effective transmission of alarm data to rescue people in distress. 3.77 Service area service area
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Part of the world where the COSPAS-SARSAT system alarm data distribution service is provided by the MCC.
3.78 System information systeminformation refers to the information in the COSPAS-SARSAT system, which consists of a data table that determines the position (ephemeris and time correction), the current status of each subsystem and the data that enables the system to work in coordination. 3.79 Alert data alertdata
In the COSPAS-SARSAT system, the general term for data derived from the 406MHz and 121.5/243MHz distress beacon information. For 406MHz beacons, the alert data contains the beacon position and other information such as the beacon identification code and code.
3.80 Alert data filtered alertdata In the COSPAS-SARSAT system, when the Mission Control Center (MCC) receives two or more identical alert messages from the same beacon, it deletes the redundant alert messages. 3.81 Ephemeris data
A set of parameters used to determine the position of a COSPAS-SARSAT system satellite relative to the Earth at any time within a specified time interval.
3.82 Time of closest approach, TCA The time when a satellite is closest to a beacon during its passage. Beacon identification data 3.83
Digital coded information of a distress beacon corresponding to the identification of a vessel in distress. 3.84
Coded information
Digital information programmed into the equipment by the user to provide relevant distress information. 3.85
Emergency locator transmitter, ELT An emergency radio beacon used for aviation in the COSPAS-SARSAT system. 6Personal locator beacon, PLB3.86
In the COSPAS-SARSAT system, an emergency radio locator beacon for land use. 3.87
Real time moderealtime mode
A mode of operation of the COSPAS-SARSAT system. When the satellite receives a distress alarm from the locator beacon, it directly forwards (121.5/243MHz) or forwards (406MHz) after processing to any local user terminal in the satellite coverage area.
BGlobal coverage modeglobalcoverage mode3.88
A mode of operation of the COSPAS-SARSAT system. The satellite processes the received distress alarm signal and stores it in the satellite memory, and continuously broadcasts the distress alarm information to the local user terminals in the satellite coverage area in a "dump" manner.
9 Beacon detection probability beacon detection probability The probability of a local user terminal receiving at least one message containing the correct protection bit encoding from the first tracked satellite; this indicator is only applicable to 406MHz beacons.
3.90 Beacon location probability beacon location probability For 406MHz beacons, it refers to the probability that when a single satellite passes, the local user terminal obtains at least four message pulse trains to estimate the Doppler curve and detect and decode. For 121.5/243MHz beacons, it refers to the positioning probability when a satellite passes and the elevation angle is greater than 10°.
4 Terrestrial communications
4.1 Terrestrial radio communications terrestrial radio communications8
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Any radio communications other than space radio communications or radio astronomy. 4.2 Terrestrial communication systems Terrestrial communication systems The system that uses medium frequency, high frequency and very high frequency bands for communication in the Global Maritime Distress and Safety System (GMDSS), mainly including radiotelephone communication, radio user telegraph communication and digital selective calling. 4.3 Terrestrial communication network Terrestrial communication networks The network composed of terrestrial communication systems in the Global Maritime Distress and Safety System (GMDSS). 4.4 Marine radiotelephone Marine radiotelephone uses medium frequency, high frequency and very high frequency special marine frequency bands for radiotelephone communication between ships, between ships and special radiotelephone stations, or between ships and users through coast stations and land communication circuits. 4.5 Single-sideband radiotelephone Single-sideband radiotelephone, SSBRT uses single-sideband amplitude modulation technology for transmitting and receiving radiotelephone communication. 4.6 Narrow-band direct-printing telegraphy, NBDP is an automatic telegraph technology that complies with the relevant recommendations of the former International Radio Consultative Committee (CCIR). 4.7 Digital selective calling, DSC is a technology that uses digital data to establish contact and transmit information between a radio station and another radio station or a group of radio stations, and complies with the relevant recommendations of the former International Radio Consultative Committee (CCIR). 4.8 Digital selective calling system, DSC system is a system mainly used by ship stations to send distress alerts and coast stations to send acknowledgment of receipt of the alert in the Global Maritime Distress and Safety System (GMDSS). Coast stations or ship stations can also use this system to forward distress alerts. 4.9 International digital selective calling (DSC) frequencies international DSC frequencies are frequencies specifically assigned to digital selective calling (DSC) in the "Radio Regulations" for international digital selective calling (DSC) services. D National DSC frequencies national DSC frequencies 4.10
Frequencies assigned to coast stations or a group of stations on which DSC is permitted to be transmitted. Automatic DSC operation at a ship station 4.11
An automatic tuning transmitter capable of unattended operation, which automatically sends an acknowledgement of receipt when receiving a DSC.
4.12 Call attempt call attempt
A sequence of one or a limited number of calls sent to the same station on one or more frequencies within a short period of time (e.g., several minutes). 4.13 Search and rescue radar transponder search and rescue radar transponder, SART A transponder operating in the 9 GHz band and capable of transmitting a series of response signals when triggered by a ship-borne or aircraft-borne 9 GHz radar signal.
4.14 Medium frequency communication medium frequency communication, MF communication Radio communication carried out on frequencies within the medium frequency (1.6~4MHz) band. 4.15 High frequency communication high frequency communication, HF communication Radio communication carried out on frequencies within the high frequency (4～27.5MHz) band. 4.16 Very high frequency communication very high frequency communication, VHF communication Radio communication carried out on channels within the very high frequency (156～174MHz) band. General call general call to all stations 4.17
A call to all ships using the ground communication system. 4.18 Controlling operator Controlling operator refers to the coast station operator who is responsible for handling radiotelephone and radio user telegraph communications sent by mobile stations to coast stations. 9 Radio determination radiodetermination 4.19
The determination of the relative direction, position, speed and other characteristics of an object using the transmission characteristics of radio waves. 9
4.20 Radio navigation radionavigation Radio determination used for navigation.
1Radiolocationradiolocation
Radio determination other than radionavigation. GB/T16162—1996
Emergency Position-Indicating Radio Beacon, EPIRB4.22
A radio station in the maritime mobile service whose transmitted signals can facilitate search and rescue operations. 4.23Radio station
One or more transmitters or receivers, or a combination of transmitters and receivers (including ancillary equipment) necessary for carrying out radiocommunication services or radio astronomy services in a certain place. Aircraft stationaircraftstation
A mobile station located on an aircraft in the aeronautical mobile service, excluding lifeboat (Xiao) stations. 4.25
5Terrestrial stationA radio station for terrestrial radiocommunications.
Survivalcraftstation Survivalcraftstation A mobile station engaged in the maritime mobile service or aeronautical mobile service and installed on any lifeboat, lifeboat or other rescue craft for rescue purposes.
Mobilestationmobilestation
A station engaged in the mobile service while in motion or when staying at a non-designated location. 4.28
Landstationlandstation
A station in the mobile service that is not used in motion. 4.29
Basestationbasestation
A land station engaged in the land mobile service. Coaststationcoaststation
A land station engaged in the maritime mobile service. Shipstationshipstation
A mobile station engaged in the maritime mobile service located on a non-permanently moored ship, excluding lifeboat (raft) stations. 4.32
On-boardcommunicationstationA low-power mobile station engaged in the maritime mobile service. Used for internal communication within the ship, communication during exercises between the mother ship and the lifeboat (lifeboat), communication between a group of pushing or towing ships, and can also be used for formation and mooring command. 4.33
Port station portstation
Coast station engaged in port operation business. 4.34
Radiodeterminationstation Radiodeterminationstation A station engaged in radiodetermination business.
Radionavigation land station Radionavigationlandstation A station engaged in radionavigation business, not for use on the move. 4.36
6 Radionavigation mobile station Radionavigationmobilestation A station engaged in radionavigation business, for use on the move or when staying at an unspecified location. 4.37
Radiolocation land station: Radiolocationlandstation A station engaged in radiolocation business, not for use on the move. 4.38
Radiolocation mobile station Radiolocationmobilestation A station engaged in radiolocation business, for use on the move or when staying at an unspecified location. 4.39
Radio direction-finding station Radio direction-finding station A radio determination station used for direction finding.
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4.40 Radio beacon station A station engaged in radio navigation services, transmitting signals to enable mobile stations to determine their relative position or direction to the beacon station. 4.41 Standard frequency and time signal station Standard frequency and time signal station A station that transmits standard frequency and time signals. 4.42 Two-way VHF radiotelephone apparatus Two-way VHF radiotelephone apparatus In distress or emergency situations, between lifeboats (rafts), between mother ships and lifeboats (rafts), or between rescue ships and lifeboats (rafts), it is a VHF radiotelephone apparatus with at least two channels (including 16 channels) that is mainly used for on-site communications. VHF emergency position-indicating radio beacon, VHFEPIRB4.43
Applicable to ships in A1 sea area, a VHF device that can send digital selective calling (DSC) alarms on VHF channel 70 (156.525MHz).
4.44 intercommunication telephone set A telephone set between two or more telephone sets that can talk directly to each other without going through a switch. Dataphone
A push-button telephone set that can be used for both data communication and general conversation. 4.46 Weather facsimile receiver A radio receiving device used to receive weather facsimile charts. VHF radio installations 4.47
A radio device that can send and receive G3E, F1B or J2B emission categories and operates between 156 and 174 MHz. 4.48 Automatic repetition request mode, ARQ mode Radio user telegraph communication between two radio stations that can perform error detection and correction. The automatic repetition request (ARQ) mode requires that the two radio stations on both sides of the communication can make the transmitter and receiver work simultaneously. 9Forward error correction mode forward error correcting mode, FEC mode 4.49
A radio user telegraph communication mode that is sent from a coast station or a ship station to two or more stations and can only perform error detection. Usually, the forward error correction mode (FEC) is used to send and receive distress, urgency or safety information. 4.50
Selective forward error correction mode selective forward error correcting mode, SELFEC mode Another variation of the forward error correction (FEC) mode, that is, its message is only sent to a specific receiving station. 4.51
Class of emission class of emission
The type of radio emission represented by standard symbols to distinguish different signal characteristics according to the main carrier, modulation method and modulating signal. 4.52 Single-sideband emission single-sideband emission, SSBemission AM emission with only one sideband.
Assigned frequency band assignedfrequencyband The frequency band in which a radio station is licensed to transmit, whose bandwidth is equal to the necessary bandwidth plus the absolute value of twice the frequency tolerance. If a space station is involved, it also includes twice the maximum possible Doppler shift. 4.54 Assigned frequency assignedfrequency A center frequency of a certain frequency band assigned to a radio station. 4.55 Paired frequencies pairedfrequencis Frequencies used in pairs; each pair of frequencies contains a transmitting frequency and a receiving frequency. 4.56 Harmful interference harmfulinterference interference that endangers the normal conduct of radionavigation or other safety services, or seriously damages, hinders or repeatedly blocks radiocommunication services.
5 Distress and safety communications
5.1 Distress and safetycommunications11
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