^ SAFETY OF LIFE AT SEA 



(c) No lifeboat may be approved the weight of which when fully laden 

 with persons and equipment exceeds 20 tons (or 20,300 kilogrammes) or which 

 has a carrying capacity calculated in accordance with Regulation 7 of this 

 Chapter of more than 150 persons. 



(d) All lifeboats permitted to carry more than 60 persons but not more 

 than 100 persons shall be either motor lifeboats complying with the require- 

 ments of Regulation 9 of this Chapter or be lifeboats fitted with an approved 

 means of mechanical propulsion complying with Regulation 10 of this Chapter. 

 All lifeboats permitted to carry more than 100 persons shall be motor lifeboats 

 complying with the requirements of Regulation 9 of this Chapter. 



(e) All lifeboats shall be of sufficient strength to enable them to be safely 

 lowered into the water when loaded with their full complement of persons and 

 equipment. All lifeboats shall be of such strength that they will not suffer 

 residual deflection if subjected to an overload of 25 per cent. 



(/) All lifeboats shall have a mean sheer at least equal to 4 per cent, of 

 their length. The sheer shall be approximately parabolic in form. 



(g) In lifeboats permitted to carry 100 or more persons the volume of the 

 buoyancy shall be increased to the satisfaction of the Administration. 



{h) All lifeboats shall have inherent buoyancy, or shall be fitted with 

 watertight air cases or other equivalent non-corrodible buoyant material which 

 shall not be adversely affected by oil or oil products, sufficient to float the boat 

 and its equipment when the boat is flooded and open to the sea. An additional 

 volume of watertight air cases or other equivalent non-corrodible buoyant 

 material, which shall not be adversely affected by oil or oil products, equal 

 to at least one-tenth of the cubic capacity of the boat shall also be provided. 

 The Administration may permit the watertight air cases to be filled with a 

 non-corrodible buoyant material which shall not be adversely affected by 

 oil or oil products. 



(/) All thwarts and side-seats shall be fitted as low in the lifeboat as 

 practicable. 



0) The block coefficient of the cubic capacity as determined in accordance 

 with Regulation 6 of this Chapter of all lifeboats, except wooden lifeboats 

 made of planks, shall be not less than 0-64. 



Regulation 6 



Cubic Capacity of Lifeboats 



(a) The cubic capacity of a lifeboat shall be determined by Stirling's 

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

 The capacity of a square-sterned lifeboat shall be calculated as if the lifeboat 

 had a pointed stern. 



Ch. 3 



