1978 Protocol Relating to the 1973 International Convention for the Prevention of Pollution from Ships

CHAPTER III. REQUIREMENTS FOR MINIMIZING OIL POLLUTION FROM OIL TANKERS DUE TO SIDE AND BOTTOM DAMAGES

Regulation 22. Damage Assumptions

1. 
   For the purpose of calculating hypothetical oil outflow from oil tankers, three dimensions of the extent of damage of a parallelepiped on the side and bottom of the ship are assumed as follows. In the case of bottom damages two conditions are set forth to be applied individually to the stated portions of the oil tanker.
   

1. 
   Side damage
   

1. 
   Longitudinal extent (c): 1/3 L^2/3 or 14.5 metres, whichever is less
   
2. 
   Transverse extent (t_c): B/5 or 11.5 metres, whichever is less
   

(inboard from the ship's side at right angles to the centre-line at the level corresponding to the assigned summer freeboard)

3. 
   Vertical extent (vc): from the base line upwards without limit
   

2. 
   Bottom damage
   

	For 0.3L from the forward perpendicular of the ship	Any other part of the ship
Longitudinal extent (s):	L/10	L/10 or 5 metres, whichever is less
Transverse extent (ts):	B/6 or 10 metres, whichever is less but not less than 5 metres	5 metres
Vertical extent from the base line (Vs):	B/15 or 6 metres, whichever is less

1. 
   Wherever the symbols given in this Regulation appear in this Chapter, they have the meaning as defined in this Regulation.