The United Kingdom Hydrographic Office

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Maritime Safety Information

Incoming hydrographic data is immediately assessed for vital information. Urgent updates are issued as Navigational Warnings or chart-updating Notices to Mariners (NMs). More than 2000 Navigational Warnings and almost 6000 Notices to Mariners were issued in 2012.
 

 

  • Notices to Mariners (PUBLIC)

    Keep informed about safety critical information. Search and download Notices to Mariners from here.
    View and download NMs

  • Notices to Mariners (DISTRIBUTORS)

    Keep informed about safety critical information. Search and download Notices to Mariners from here.
    View and download NMs

  • Notices to Mariners (NM LICENSEES)

    Keep informed about safety critical information. Search and download Notices to Mariners from here.
    View and download NMs

  • Hydrographic Notes

    You can download Hydrographic Notes here, for informing us of any navigationally significant information.
    Click here for Hydrographic Notes

  • Radio Navigational Warnings

    We act as the NAVAREA I (NE Atlantic) Co-ordinator for the IMO) and IHO Worldwide Navigational Warning Service and also as the United Kingdom National Co-ordinator for issuing coastal warnings.
    Search all warnings in force

  • Security Related Information to Mariners

    Keep informed about security of navigation issues and safety critical information associated with military operations. Search and download Security Related Information to Mariners from here.
    Search and download here
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