Regulation 31 - Danger Messages


  • Masters to communicate information on navigational dangers.
  • Contracting Governments to promulgate danger information.
  • Messages free of charge to ships.
Regulation 31
1. The master of every ship which meets with dangerous ice, a dangerous derelict, or any other direct danger to navigation, or a tropical storm, or encounters sub-freezing air temperatures associated with gale force winds causing severe ice accretion on superstructures, or winds of force 10 or above on the Beaufort scale for which no storm warning has been received, is bound to communicate the information by all means at his disposal to ships in the vicinity, and also to the competent authorities. The form in which the information is sent is not obligatory. It may be transmitted either in plain language (preferably English) or by means of the International Code of Signals.
2. Each Contracting Government will take all steps necessary to ensure that when intelligence of any of the dangers specified in paragraph 1 is received, it will be promptly brought to the knowledge of those concerned and communicated to other interested Governments.
3. The transmission of messages respecting the dangers specified is free of cost to the ships concerned.
4. All radio messages issued under paragraph 1 shall be preceded by the safety signal, using the procedure as prescribed by the Radio Regulations as defined in regulation IV/2.
MCA Guidance
1. Reg. 31 applies to all ships.
2. See guidance notes following Regulation 32.


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