They are divided into conventional and satellite communications Conventional (terrestrial) communications: They operate in the MF, HF, and VHF frequency areas. They use the digital selective-calling (DSC), radiotelephony, radioteletypy, NAVTEX and RADAR transmitters. Satellite communications: They are conducted via the satellite systems Inmarsat and Compass-Sarsat. Inmarsat: International satellite maritime organization that operates with four geostationary […]

Maritime safety information (MSI) are in fact navigational and meteorological warnings and notices concerning navigation safety which are transmitted from coast stations to the vessels. There are seven basic categories of MSI: • Navigational Warnings; • Meteorological Warnings; • Ice Reports; • Search and Rescue information; • Meteorological forecasts; • Pilot service messages; • Electronic […]