A. The PCSOPEP tier classification must follow one of the following categories:

•Tier S for vessels with an oil carrying capacity of 400 MT up to 1,000 MT.
• Tier 1 for vessels with an oil carrying capacity of more than 1,000 MT up to 7,000 MT
• Tier 1 and Tier 2 for vessels with an oil carrying capacity of more than 7,000 MT up to 15,000 MT.
• Tier 1, Tier 2, and Tier 3 for vessels with an oil carrying capacity of more than 15,000 MT.

The oil carrying capacity of a vessel is equal to the sum of the maximum capacities of fuel system tanks, oil cargo tanks, lube oil tanks, slop tanks, and any other tanks or compartments used to transport MARPOL 73/78 Annex I products. The total oil carrying capacity must be reported in metric tons. For the purpose of converting volume in cubic meters (m3) to metric tons, the following formula applies:

Metric Ton= 0.9442 x m3