The maritime mobile frequency band supports maritime communications worldwide. Appendix 18 of the ITU Radio Regulations (RR) defines the channels of the maritime mobile service. These channels support a variety of communication functions including: public correspondence, intership and ship-to-coast, coast- to-ship, port operations, calling and various safety purposes. Safety functions include distress, search and rescue, ship movement, navigation (bridge-to-bridge) communications, and maritime safety information broadcasts. Additional maritime mobile channels are required to meet the growing demands for the above services in the near future, particularly the demand for digital services. The United States plans to submit a proposal in the upcoming 1997 World Radio Conference (WRC -97) to permit narrowbanding the maritime mobile VHF band. To support that proposal, the United States Coast Guard and the National Telecommunications and Information Administration (NTIA) conducted bench and radiated tests of 25 kHz (referred to as wideband) and 12.5 kHz (referred to as narrowband) channelized marine radios.
Assessment of Compatibility between 25 and 12.5 kHz Channelized Marine VHF Radios
1997
76 pages
Report
No indication
English
12.5: Boden- und Gewässerschutz
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