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update 27 Apr. 2006
Hydrographic and Oceanographic DepartmentNotices to Mariners
& Navigational Warnings
 
     〜For the Safety of Maritime Traffic〜



 Information for safe navigation is offered via Notices to Mariners.Urgent navigational notices, are broadcasted as Navigational Warnings through NAVAREA, NAVTEX and so on.
 JCG issues NAVAREA XI Navigational Warnings as Area Coordinator of XIth region (Eastern Asian region under the system of World-Wide Navigational Warning Service, a framework of IHO and IMO, and also issues NAVTEX Navigational Warnings for the seas adjacent to Japan.

Notices to Mariners Informations is offered through both the printed material and the Internet weekly to update Nautical charts and to secure maritime traffic.
Regional Coast Guard Headquarter'sNotices to Mariners
(Japanese version only)
Information for maritime traffic safety is offered weekly through the Internet,FAX and E-mail by R.C.G.H.
Japan Navigational Warnings
(Japanese version only)
For the safety of Japanese ships sailing in the Pacific Ocean,the Indian Ocean,and their marginal seas,urgent notices are broadcasted through the Internet.
NAVAREA XI Navigational Warnings The World-Wide Navigational Warning Service consists of 16 Navigation Warning Areas(NAVAREAs).Within each NAVAREA,one national authority is designated as the Area Coordinator who has responsibility for information management and warning issuance.Japan is appointed as the coordinator for NAVAREA XI. NAVAREA XI issues navigational warnings in English,though Enhanced Group Call (EGC)via INMARSAT stationary satellite.Its information is also available on the Internet.
NAVTEX Navigational Warnings NAVTEX is an international standard method for broadcasting coastal navigational warnings.It sends message in English and Japanese.NAVTEX service around Japan consists of 5 areas. Each area covers up to 300miles from the coast. Its information is also available on the Internet. And you can access local area information less than about 50km from the coast using a cellular Phone(Japanese version only.)
Local Navigational Warnings Urgent information necessary for ships in Japanese ports or near waters is broadcasted,in English or Japanese on VHF. Its information is also available on the Internet. And you can access local area information in the coast using a celluar phone(Japanese version only)




NAVTEX Navigational Warnings & Local Navigational Warnings by cellular phone (Japanese version only)
i-mode http://www1.kaiho.mlit.go.jp/keitai/TUHO/keiho/
EZ web http://www1.kaiho.mlit.go.jp/keitai/TUHO/keiho/ez/
Vodafone live! http://www1.kaiho.mlit.go.jp/keitai/TUHO/keiho/js/