Regulation 5 - Meteorological
services and warnings
1 Contracting Governments undertake to encourage
the collection of meteorological data by ships at sea and to arrange
for their examination, dissemination and exchange in the manner most
suitable for the purpose of aiding navigation.footnote Administrations shall encourage the use of meteorological
instruments of a high degree of accuracy, and shall facilitate the
checking of such instruments upon request. Arrangements may be made
by appropriate national meteorological services for this checking
to be undertaken, free of charge to the ship.
2 In particular, Contracting Governments undertake
to carry out, in co-operation, the following meteorological arrangements:
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.1 to warn ships of gales, storms and tropical
cyclones by the issue of information in text and, as far as practicable
graphic form, using the appropriate shore-based facilities for terrestrial
and space radiocommunications services.
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.2 to issue, at least twice daily, by terrestrial
and space radiocommunication servicesfootnote,
as appropriate, weather information suitable for shipping containing
data, analyses, warnings and forecasts of weather, waves and ice.
Such information shall be transmitted in text and, as far as practicable,
graphic form including meteorological analysis and prognosis charts
transmitted by facsimile or in digital form for reconstitution on
board the ship's data processing system.
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.3 to prepare and issue such publications as may
be necessary for the efficient conduct of meteorological work at sea
and to arrange, if practicable, for the publication and making available
of daily weather charts for the information of departing ships.
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.4 to arrange for a selection of ships to be equipped
with tested marine meteorological instruments (such as a barometer,
a barograph, a psychrometer, and suitable apparatus for measuring
sea temperature) for use in this service, and to take, record and
transmit meteorological observations at the main standard times for
surface synoptic observations (i.e. at least four times daily, whenever
circumstances permit) and to encourage other ships to take, record
and transmit observations in a modified form, particularly when in
areas where shipping is sparse.
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.5 to encourage companies to involve as many of
their ships as practicable in the making and recording of weather
observations; these observations to be transmitted using the ship's
terrestrial or space radiocommunications facilities for the benefit
of the various national meteorological services.
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.6 the transmission of these weather observations
is free of charge to the ships concerned.
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.7 when in the vicinity of a tropical cyclone,
or of a suspected tropical cyclone, ships should be encouraged to
take and transmit their observations at more frequent intervals whenever
practicable, bearing in mind navigational preoccupations of ships'
officers during storm conditions.
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.8 to arrange for the reception and transmission
of weather messages from and to ships, using the appropriate shore-based
facilities for terrestrial and space radiocommunications services.
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.9 to encourage masters to inform ships in the
vicinity and also shore stations whenever they experience a wind speed
of 50 knots or more (force 10 on the Beaufort scale).
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.10 to endeavour to obtain a uniform procedure
in regard to the international meteorological services already specified,
and as far as practicable, to conform to the technical regulations
and recommendations made by the World Meteorological Organization,
to which Contracting Governments may refer, for study and advice,
any meteorological question which may arise in carrying out the present
Convention.
3 The information provided for in this regulation
shall be furnished in a form for transmission and be transmitted in
the order of priority prescribed by the Radio Regulations. During
transmission "to all stations" of meteorological information, forecasts
and warnings, all ship stations must conform to the provisions of
the Radio Regulations.
4 Forecasts, warnings, synoptic and other meteorological
data intended for ships shall be issued and disseminated by the national
meteorological service in the best position to serve various coastal
and high seas areas, in accordance with mutual arrangements made by
Contracting Governments, in particular as defined by the World Meteorological
Organization's System for the preparation and dissemination of meteorological
forecasts and warnings for the high seas under the global maritime
distress and safety system (GMDSS).
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