Maritime radiocommunications, which include telecommunications between the shore (land subscribers) and ships, and between ships, may be classified into the following categories, according to the navigation area: harbour, coastal and ocean communications. Furthermore, maritime radiocommunications may also be classified according to message content. Besides telephony and telegraphy, there are various kinds of messages such as safety, messages and broadcasting. Moreover there are many radionavigation systems such as radiobeacons, Loran, Decca and Omega, Band 7(HF), 3-30MHz, is used for ocean communication. High quality services cannot be obtained by use of band 7, so a satisfactory quality is expected to be attained only by the introduction of microwave techniques.
The maritime mobile service, its functions and constitution
Beweglicher Seefunkdienst, seine Funktionen und seine Struktur
Telecommunication Journal, English Edition ; 44 , 5 ; 239-242
1977
4 Seiten, 3 Bilder, 2 Tabellen
Article (Journal)
English
The maritime mobile service and the developing countries
Tema Archive | 1984
|HF Al morse calling in the maritime mobile service
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|New satellite-repeater systems for maritime mobile telephone service
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