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7. Teknologi
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7.23 NAVTEX
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What is Navtex? Home page
NAVTEX is a system for the broadcast and automatic reception of maritime safety information by
means of a narrow-band direct- printing telegraphy. NAVTEX provides shipping with navigational
and meteorological warnings and urgent information through automatic printouts from a dedicated
receiver.
NAVTEX is a component of the IMO/IHO Worldwide Navigational Warning Service (WWNWS) defined
by IMO Assembly resolution A.706(17). It has also been included as an element of the Global
Maritime Distress and Safety System (GMDSS). Since 1 August 1993, NAVTEX receiving capability
has become part of the mandatory equipment which is required to be carried in certain vessels
under the provisions of the International Convention for the Safety of Life at Sea (SOLAS).
How does it Work?
NAVTEX transmissions are sent via a single frequency from localized stations situated worldwide.
The power of each transmission is regulated so as to avoid the possibility of interference between
transmitters. Users can set their NAVTEX receivers to receive specific message types and reject
others. Messages such as navigational and meteorological warnings and search and rescue
information are non- rejectable to ensure that ships equipped with NAVTEX always receive the most
vital information. Users can choose to receive information from the single transmitter that serves
the sea area around their position, or from a number of transmitters. If you would like to know
more about how NAVTEX messages are created and transmitted you may find this pictorial
representation helpful.
NAVTEX Coverage
NAVTEX messages are transmitted worldwide from local stations, the number of stations grows
month by month. We have produced a NAVTEX Database which provides details about all known
NAVTEX stations, details include name, position, range, and operational status.
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