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.
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
transmission of messages respecting the dangers specified
is free of cost to the ships concerned.
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.