Radiocommunication services
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A Radiocommunication service is according to Article 1.19 of the International Telecommunication Union´s (ITU)RR, defined as “a service…involving the transmission, emission and/or reception of radio waves for specific telecommunication purposes”.
Radiocommunication is sub-divided into space and terrestrial radiocommunication. Space radiocommunication is defined in RR Article 1 as “any radiocommunication involving the use of one or more space stations or the use of one or more reflecting satellites or other objects in space”. Terrestrial radiocommunication is defined as “any radiocommunication other than space radiocommunication or radio astronomy”.
Sub-sets of services and branches
Some services are a sub-set of another service. For example, the maritime mobile service can be thought of as a branch of the mobile service which encompasses the land, maritime and aeronautical mobile services. For many terrestrial radiocommunication communication services, there is a parallel space radiocommunication service e.g., the broadcasting service and the broadcasting-satellite service.
Further sub-sets of some of these internationally defined services are often created at the national level No matter what definitions are adopted in a given country, with some specific exceptions which are allowed for in the ITU RRs, the use of the spectrum must fit in with the international definitions of radio services.
Radiocommunication services of interest
| ITU RR Article | Description | Short | Definition |
| 1.20 | Fixed service | fixed | Radiocommunication service between specified fixed points |
| 1.21 | Fixed-satellite service | FSS | Radiocommunication service between earth stations at given positions, when one or more satellites are used |
| 1.24 | Mobile service | mobile | Radiocommunication service between mobile and land stations, or between mobile stations |
| 1.25 | Mobile-satellite service | MSS | Radiocommunication service between mobile earth stations and one or more space stations, or between space stations used by this service; or between mobile earth stations by means of one or more space stations. |
| 1.28 | Maritime mobile service | MMS | Mobile service between coast stations and ship stations, or between ship stations, or between associated on-board communication stations. |
| 1.29 | Maritime mobile-satellite service | MMSS | 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 |
| 1.44 | Maritime radionavigation service | MRNS | Radionavigation service intended for the benefit and for the safe operation of ships |
| 1.45 | Maritime radionavigation-satellite service | MRNSS | A radionavigation-satellite service in which earth stations are located on board ships |
