Maritime frequencies are protected by a set of rules and procedures. Their use is supported by technical standards, and reports, while the International Telecommunication Union (ITU) is managing the needs of the radio frequency spectrum.
The Radiocommunication Sector (ITU-R) of the International Telecommunication Union (ITU) manages the needs of the radio frequency spectrum for all radiocommunications systems worldwide, including those of maritime radiocommunication and radionavigation.
Maritime...
https://safety4sea.com/how-wireless-communications-ensures-safe-navigation/