565 



tents of the damaged compartments; and the distribution, specific 

 gravities and the free surface effect of liquids. The calculations shall 

 be based on the following : 



(a) Account shall be taken of any empty or partially filled 

 tank, the specific gravity of cargoes carried, as well as any outflow 

 of liquids from damaged compartments. 



(b) The permeabilities are assumed as follows : 



Spaces Permeability 



Appropriated to stores 0. 60 



Occupied by accommodation 0. 95 



Occupied by machinery 0. 85 



Voids 0. 95 



Intended for consumable liquids or ^ 0. 95 



Intended for other liquids to ^ 0. 95 



1 Whichever results in the more severe requirements. 



2 The permeability of partially filled compartments shall be consistent with the amount 

 of liquid carried. 



(c) The buoyancy of any superstructure directly above the side 

 damage shall be disregarded. The unflooded parts of superstruc- 

 tures beyond the extent of damage, however, may be taken into 

 consideration provided that they are separated from the damaged 

 space by watertight bulkheads and the requirements of sub-para- 

 graph (3) (a) of this Regulation in respect of tliese intact spaces 

 are complied with. Hinged watertight doors may be acceptable 

 in watertight bulkheads in the superstructure. 



(d) The free surface effect shall be calculated at an angle of 

 heel of 5 degrees for each individual compartment. The Admin- 

 istration may require or allow the free surface corrections to be 

 calculated at an angle of heel greater than 5 degrees for partially 

 filled tanks. 



(e) In calculating the effect of free surfaces of consumable 

 liquids it shall be assumed that, for each type of liquid at least one 

 transverse pair or a single centre line tank has a free surface 

 and the tank or combination of tanks to be taken into account 

 shall be those where the effect of free surfaces is the greatest. 



(5) The Master of every oil tanker and the person in charge of a 

 noii-self-propelled oil tanker to which this Annex applies shall be sup- 

 plied in an approved form with : 



(a) information relative to loading and distribution of cargo 

 necessary to ensure compliance with the provisions of this Regu- 

 lation ; and 



(b) data on the ability of the ship to compl^^ with damage sta- 

 bility criteria as determined by this Regulation, including the 

 effect of relaxations that may have been allowed under sub-para- 

 graph (1) (c) of this Regulation. 



35-415—75 37 



