INTERNATIONAL CONVENTION SAFETY OF LIFE AT SEA. 225 



tained by this means by agreement between the Governments of the High Contracting Parties. 



By "certificated watcher" is meant any person holding a certificate issued under the au- 

 thority of the Administration concerned. To obtain this certificate, the apphcant must 

 prove that he is capable of receiving and understanding the radiotelegraph distress signal 

 and the safety signal described in the Regulations annexed hereto. 



The High Contracting Parties undertake to take steps to insure that the certificated 

 watchers observe the secrecy of correspondence. 



Article 35. 



The radiotelegraph installations required by Article 31 above shall be capable of trans- 

 mitting clearly perceptible signals from ship to ship over a range of at least 100 sea miles 

 by day under normal conditions and circumstances. 



Every vessel which is required, in conformity with the provisions of Article 31 above, 

 to be fitted with a radiotelegraph installation, shall, whatever be the class in which it is 

 placed, be provided in accordance with Article XI of the Regulations annexed to the Inter- 

 national Radiotelegraph Convention, 1912, with an emergency installation, every part of 

 which is placed in a position of the greatest possible safety to be determined by the Gov- 

 ernment of the country to which the vessel belongs. 



In all cases the emergency installation must be placed, in its entirety, in the upper part of 

 the vessel, as high as practically possible. 



The emergency installation includes, as provided by Article XI of the Regulations an- 

 nexed to the International Radiotelegraph Convention, 1912, an independent source of en- 

 ergy capable of being put into operation rapidly and of working for at least six hours with a 

 minimum range of 80 sea miles for vessels in the First Class and 50 sea miles for vessels in 

 the two other Classes. 



If the normal installation, which in accordance with this Article has a range of at least 

 100 sea miles, satisfies all the conditions prescribed above, an emergency installation is not 

 required. . 



The license provided for in Article IX of the Regulations annexed to the International 

 Radiotelegraph Convention, 1912, may not be issued vmless the installation complies both 

 with the provisions of that Convention, and also with the provisions of this Convention. 



Article 36. 



The matters governed by the International Radiotelegraph Convention, 1912, and the 

 Regulations annexed thereto, and in particular the radiotelegraph installations on ships, 

 the transmission of messages, and the certificates of the operators, remain and will continue 

 subject to the provisions — 



(1) Of that Convention and the Regulations annexed thereto, or of any other instru- 

 ments which may in the future be substituted therefor; 



(2) Of this Convention, in regard to all the points in which it supplements the afore- 

 mentioned documents. 



Article 37. 



Every master of a vessel who receives a call for assistance from a vessel in distress is 

 bound to proceed to the assistance of the persons in distress. 



