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Maritime mobile-satellite service (MMSS, or maritime mobile-satellite radiocommunication service) is – according to Article 1.29 of the International Telecommunication Union's Radio Regulations (RR)[1] – "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.
Classification
[edit]This radiocommunication service is classified in accordance with ITU Radio Regulations (article 1) as follows:
Mobile service
- Maritime mobile service (article 1.28)
- Maritime mobile-satellite service
- Port operations service (article 1.30)
- Ship movement service (article 1.31)
Frequency allocation
[edit]The allocation of radio frequencies is provided according to Article 5 of the ITU Radio Regulations (edition 2012).[2]
In order to improve harmonisation in spectrum utilisation, the majority of service-allocations stipulated in this document were incorporated in national Tables of Frequency Allocations and Utilisations which is with-in the responsibility of the appropriate national administration. The allocation might be primary, secondary, exclusive, and shared.
- primary allocation: is indicated by writing in capital letters
- secondary allocation: is indicated by small letters
- exclusive or shared utilization: is within the responsibility of administrations
- Example of frequency allocation
Allocation to services | ||
Region 1 | Region 2 | Region 3 |
137–137.025
|
- Selection of MMSS stations
-
Space radio station, Inmarsat-3 satellite
-
Earth station, telephone terminal
-
Inmarsat aerial (stern of the yacht)
-
Inmarsat aerial of the US Navy
-
Hand-held radios of the MMSS
-
Inmarsat satellite telephone