Category –2 : Commonly known as MARPOL oil tankers of size 20,000 dwt and above to carry Crude oil, Fuel Oil, Lubricating Oil or Heavy Diesel Oil as cargo and of 30,000 and above carrying other oils, which do comply with requirements for protectively located segregated ballast tanks.
Category –3 :Oil tankers of 5000dwt and above but less than dwt specified for Categories 1 and 2.
