CI 48 SAFETY OF LIFE AT SEA 



when practicable, sufficient additional information to enable simpU 

 weather charts to be prepared at sea and also to encourage the 

 transmission of suitable facsimile weather charts. 



(iii) To prepare and issue such publications as may be necessary for thd 

 efficient conduct of meteorological work at sea and to arrange, in 

 practicable, for the publication and making available of dailyj 

 weather charts for the information of departing ships. 



(iv) To arrange for selected ships to be equipped with tested instrument 

 (such as a barometer, a barograph, a psychrometer, and suitabh 

 apparatus for measuring sea temperature) for use in this service,! 

 and to take meteorological observations at main standard times 

 for surface synoptic observations (at least four times daily, whenevei 

 circumstances permit) and to encourage other ships to take obser- 

 vations in a modified form, particularly when in areas where! 

 shipping is sparse; these ships to transmit their observations byj 

 radio for the benefit of the various official meteorological services/ 

 repeating the information for the benefit of ships in the vicinityj 

 When in the vicinity of a tropical storm, or of a suspected tropical 

 storm, ships should be encouraged to take and transmit thei 

 obser\ations at more frequent intervals whenever practicable,] 

 bearing in mind navigational preoccupations of ships" officers during 

 storm conditions. 



(v) To arrange for the reception and transmission by coast radio stations' 

 of weather messages from and to ships. Ships which are unable 

 to communicate direct with shore shall be encouraged to relay their 

 weather messages through ocean weather ships or through other 

 ships which are in contact with shore. 



(vi) To encourage all 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). 



(vii) To endeavour to obtain a uniform procedure in regard to the inter- 

 national meteorological services already specified, and, as far as is 

 practicable, to conform to the Technical Regulations and 

 recommendations made by the World Meteorological Organization, 

 to which the Contracting Governments may refer for study and 

 advice any meteorological question which may arise in canying 

 out the present Convention, 

 (c) The information provided for in this Regulation shall be furnished in 

 form for transmission and transmitted in the order of priority prescribed by 



Ch. 5 



