C130 SAFETY OF LIFE AT SEA IH' 



continuous listening watch on the radiotelephone distress frequency, in the 

 place on board from which the ship is usually navigated, using a loud-speaker 

 or other appropriate means. 



(h) Listening may be discontinued -* 



(i) when the receiving equipment is being used for traffic on another 



frequency and a second receiver is not available; or 

 (ii) when, in the opinion of the master, conditions are such that 

 maintenance of the listening watch would interfere with the safe 

 navigation of the ship. 

 Listening watch should, however, as far as possible be maintained during the 

 silence periods provided for in the Radio Regulations. 



PART C— TECHNICAL REQUIREMENTS 

 Regulation 8 



Radiotelegraph Stations 



(a) The radiotelegraph station shall be so located that no harmful 

 interference from extraneous mechanical or other noise will be caused to the 

 proper reception of radio signals. The station shall be placed as high in the 

 ship as is practicable, so that the greatest possible degree of safety may be 

 secured. 



(b) The radiotelegraph operating room shall be of sufficient size and of 

 adequate ventilation to enable the main and reserve radiotelegraph installa- 

 tions to be operated efficiently, and shall not be used for any purpose which 

 will interfere with the operation of the radiotelegraph station. 



(c) The sleeping accommodation of at least one radio officer shall be 

 situated as near as practicable to the radiotelegraph operating room. In new 

 ships, this sleeping accommodation shall not be within the radiotelegraph 

 operating room. 



(d) There shall be provided between the radiotelegraph operating room 

 and the bridge and one other place, if any, from which the ship is navigated, 

 an efficient two-way system for calling and voice communication which shall 

 be independent of the main communication system on the ship. 



(e) The radiotelegraph installation shall be installed in such a position 

 that it will be protected against the harmful effects of water or extremes of 

 temperature. It shall be readily accessible both for immediate use in case of 

 distress and for repair. 



(/) A reliable clock with a dial not less than five inches (or 12-5 centi- 

 metres) in diameter and a concentric seconds hand, the face of which is marked 

 to indicate the silence periods prescribed for the radiotelegraph service by the 

 Radio Regulations, shall be provided. It shall be securely mounted in the 

 radiotelegraph operating room in such a position that the entire dial can be 

 easily and accurately observed by the radio officer from the radiotelegraph 

 operating position and from the position for testing the radiotelegraph auto 

 alarm receiver. 



Ch. 4 



Kx. Doc. K. 87-1 O 11 



