Navigational warnings: reporting and broadcasting hazards at sea

The Maritime and Coastguard Agency is responsible for broadcasting the warnings issued by the UK Hydrographic Office (UKHO) to vessels at sea. Radio broadcasts are made about known and potential risks. The attached below document outlines:

  • how and when warnings are broadcast
  • what kind of activities require a warning
  • how to inform UKHO that a hazard requires a navigational warning
  • broadcast charges to those reponsible for the hazard that’s issued as a warning


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