SAFETY OF LIFE AT SEA C29 



if) Where a main transverse bulkhead is recessed or stepped, an equivalent 

 plane bulkhead shall be used in determining the subdivision. 



(g) If the distance between two adjacent main transverse bulkheads, or 

 their equivalent plane bulkheads, or the distance between the transverse planes 

 passing through the nearest stepped portions of the bulkheads, is less than 

 10 feet (or 3 05 metres) plus 3 per cent, of the length of the ship, or 35 feet 

 (or 10-67 metres) whichever is the less, only one of these bulkheads shall be 

 regarded as forming part of the subdivision of the ship in accordance with 

 the provisions of Regulation 5 of this Chapter. 



(/z) Where a main transverse watertight compartment contains local 

 subdivision and it can be shown to the satisfaction of the Administration that, 

 after any assumed side damage extending over a length of 10 feet (or 3 05 

 metres) plus 3 per cent, of the length of the ship, or 35 feet (or 10-67 metres) 

 whichever is the less, the whole volume of the main compartment will not 

 be flooded, a proportionate allowance may be made in the permissible length 

 otherwise required for such compartment. In such a case the volume of 

 effective buoyancy assumed on the undamaged side shall not be greater than 

 that assumed on the damaged side. 



(/■) Where the required factor of subdivision is -50 or less, the combined 

 length of any two adjacent compartments shall not exceed the floodable 

 length. 



t 



Regulation 7 



Stability of Ships in Damaged Condition 



(a) 5uflBcient intact stability shall be provided in all service conditions 

 so as to enable the ship to withstand the final stage of flooding of any one 

 main compartment which is required to be within the floodable length. 



Where two adjacent main compartments are separated by a bulkhead which 

 is stepped under the conditions of sub-paragraph (e) (i) of Regulation 6 of 

 this Chapter the intact stability shall be adequate to withstand the flooding 

 of those two adjacent main compartments. 



Where the required factor of subdivision is 50 or less but more than 33 

 intact stability shall be adequate to withstand the flooding of any two adjacent 

 main compartments. 



Where the required factor of subdivision is 33 or less the intact stability 

 shall be adequate to withstand the flooding of any three adjacent main 

 compartments. 



{b) (i) The requirements of paragraph (a) of this Regulation shall be 

 determined by calculations which are in accordance with paragraphs (c), {d) 

 and (/) of this Regulation and which take into consideration the proportions and 



Ch. 2 



