264 SOCIETY NAVAL ARCHITECTS AND MARINE ENGINEERS. 



Article XXXV. 



CAPACITY LIMITS. 



Pontoon boats and pontoon rafts shall never be marked with a number of persons 

 greater than that obtained in the manner specified in these Regulations. 

 This number shall be reduced — 



(1) When it is greater than the number of persons for which there is proper seating 

 accommodation, the latter number being determined in such a way that the persons when 

 seated do not interfere in any way with the use of the oars. 



(2) When, in the case of boats other than those of the first two sections of the first 

 class, the freeboard when the boat is fully loaded is less than the freeboard laid down for 

 each type respectively. In such circumstances the number shall be reduced until the free- 

 board when the boat is fully loaded is at least equal to the standard freeboard laid down 

 above. 



In boats of types IC and 2B the raised part of the deck at the sides may be regarded 

 as affording seating accommodation. 



Article XXXVI. 



EQUIVALENTS FOR AND WEIGHT OF THE PERSONS. 



In the tests for determining the number of persons which a boat or pontoon raft can ac- 

 commodate each person shall be assumed to be an adult person wearing a life jacket. 



In verifications of freeboard the pontoon boats shall be loaded with a weight of at 

 least 75 kilograms (165 pounds) for each adult person that the pontoon boat is authorized 

 to carry. 



In all cases two children under 12 years of age shall be reckoned as one person. 



Article XXXVII. 



CUBIC CAPACITY OF OPEN BOATS OF THE FIRST CLASS. 



1. The cubic capacity of an open boat of type lA or IB shall be determined by Stir- 

 ling's (Simpson's) Rule or by any other method giving the same degree of accuracy. The 

 capacity of a square-sterned boat shall be calculated as if the boat had a pointed stern. 



2. For example, the capacity in cubic meters (or cubic feet) of a boat, calculated by 

 the aid of Stirling's Rule, may be considered as given by the following formula : 



Capacity = ^^(4^ + 25 + 4C) 



/ being the length of the boat in meters (or feet) from the inside of the planking or plating 

 at the stem to the corresponding point at the stern post ; in the case of a boat with a square 

 stern the length is measured to the inside of the transom. 



A, B, C denote respectively the areas of the cross sections at the quarter length forward, 

 amidships, and the quarter length aft, which correspond to the three points obtained by di- 

 viding / into four equal parts. (The areas corresponding to the two ends of the boat are 

 considered negligible.) 



The areas A, B, C shall be deemed to be given in square meters (or square feet) by 

 the successive application of the following formula to each of the three cross sections : 



Area ^ -^(a + 4b + 2c -\- 4d + e) 



