Region Navwarns Long range Programmed transmissions by the coordinator of the region. They can cover, in a 24 hour basis, a sea area that can be covered by a fast vessel (almost 700m). Coastal Navwarns Programmed transmissions by a national coordinating authority, via the national inshore stations. They cover the country’s sea area. Local Navwarns […]

WWNWS is a service inside the G.M.D.S.S system. It is about navigation safety information and provides information that mainly concern: • Nautical perils • Minor Lights and buoys damages • Drifted mines • Wire casting or other sub-marine activities • Drills • Ship- Aircraft firing • Dangerous wrecks • Constructions or works in harbors and […]

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 […]

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 […]