Marine Radio

Marine Radio






The High Frequency (HF) band of radio waves includes the range from 3 to 30 MHz inclusive. HF is a major part of the shortwave band of frequencies which are used for long distance communication, including intercontinental distances. The band is used by international shortwave broadcasting stations, aviation communication, government time stations, weather stations, amateur radio and citizens band services, among other uses.



The term Very High Frequency (VHF) refers to the VHF maritime mobile band which is the radio frequency range between 156.0 and 162.025 MHz inclusive. The frequencies are divided into channels (eg channel 16) for ease of use. The VHF band sits above the HF band (ie, higher frequencies) and is used for relatively short distances which makes it ideal for maritime radio.



The Automatic Identification System (AIS) is an automatic tracking system used on ships for identifying and locating vessels by electronically exchanging data with other nearby ships and AIS base stations.



Digital Selective Calling is a standard developed to send pre-defined digital distress messages via medium frequency (MF), high frequency (HF) and very high frequency (VHF) maritime radio bands.