C22 SAFETY OF LIFE AT SEA 



v= whole volume of the portion of the ship below the margin line before 

 (or abaft) the machinery space. 



(d) In the case of a ship which is permitted under paragraph (c) of 

 Regulation 27 of Chapter III to carry a number of persons on board in 

 excess of the lifeboat capacity provided, and is required under paragraph {d) 

 of Regulation 1 of this Chapter to comply with special provisions, the uniform 

 average permeability throughout the portion of the ship before (or abaft) the 

 machinery space shall be determined from the formula — 



95-35 — 



V 



where : 



:the volume of the spaces below the margin line and above the tops of 

 floors, inner bottom, or peak tanks, as the case may be, which are 

 appropriated to and used as cargo spaces, coal or oil fuel bunkers, 

 store rooms, baggage and mail rooms, chain lockers and fresh water 

 tanks, before (or abaft) the machinery space; and 



v=whole volume of the portion of the ship below the margin line before 

 (or abaft) the machinery space. 



In the case of ships engaged on services where the cargo holds are not 

 generally occupied by any substantial quantities of cargo, no part of the 

 cargo spaces is to be included in calculating " b ". 



(e) In the case of unusual arrangements the Administration may allow, or 

 require, a detailed calculation of average permeability for the portions before 

 or abaft the machinery space. For the purpose of such calculation, the 

 permeability of passenger spaces as defined in Regulation 2 of this Chapter 

 shall be taken as 95, that of spaces containing machinery as 85, that of all 

 cargo, coal and store spaces as 60, and that of double bottom, oil fuel and 

 other tanks at such value as may be approved in each case. 



(/) Where a between deck compartment between two watertight transverse 

 bulkheads contains any passenger or crew space, the whole of that compart- 

 ment, less any space completely enclosed within permanent steel bulkheads 

 and appropriated to other purposes, shall be regarded as passenger space. 

 Where, however, the passenger or crew space in question is completely 

 enclosed within permanent steel bulkheads, only the space so enclosed need 

 be considered as passenger space. 



Ch. 2 



