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Encyclopedia of Marine and Energy Technology



An international maritime radio telex system sponsored by IMO and IHO, which automatically receives the broadcast telex information such as navigational, meteorological warnings and search and rescue (SAR) alerts on 24-hour watch basis.

NAVTEX is a method of transmitting navigational warnings and weather forecasts from designed coast radio stations. All English-language transmissions are made on 518 kHz and each station is allocated several time “slots” during the day, when it is permitted to transmit. These are normally emitted at fou-hour intervals. Except for the gale warnings and search and rescue messages which can be transmitted at any time. Reception of NAVTEX is limited to an area of 200-300-mile radius around each transmitting station, although considerably greater ranges are possible at night.

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