where C is the vessel’s total volume of oil fuel in m3 (ft3) at 98% tank filling. The minimum value of w = 1.0 m (3.3 ft).
17.3.2(b) Probabilistic Approach. As an alterative to the deterministic approach of 4-6-4/17.3.2(a), arrangements complying with the accidental oil fuel outflow performance standard of Regulation 12A, Annex I, MARPOL 73/78, as amended, would be acceptable.
17.5 Class Notation – POT
In addition to the requirements for fuel oil tank protection as specified in 4-6-4/17.3.1 utilizing the deterministic approach of 4-6-4/17.3.2(a), where lubricating oil tanks are also arranged in the same manner as required by the deterministic approach [4-6-4/17.3.2(a)] for fuel oil tanks, vessels are to be eligible for the optional Class notation, POT – Protection of Fuel and Lubricating Oil Tanks. Further, the following exemptions are applicable to lubrication oil tanks:
i) In application of equation in 4-6-4/17.3.2(a)ii) or iii), total volume of lubricating oil tanks need not be accounted for C (vessel’s total volume of oil fuel in m3 (ft3) at 98% tank filling).
ii) Tanks used as main engine lubricating oil drain tanks need not be located in a protected location away from the vessel’s side or bottom plates.