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自演ヤローまだいたのか

「C重油と同質の米軍重油」とかシレッと変節してるし
NSFOはC重油とは別物だろうが

* NSFO (Navy special fuel oil) - Another name for no. 5 HFO
* MFO (Marine fuel oil) - Another name for no. 6 HFO

Ships also take on large amounts of sea water as ballast, often into empty fuel tanks, to maintain stability. The water is eventually discharged, such as when taking on fuel, and residual fuels in the tanks go overboard with the ballast water. A navy study estimated that on,y about 0.1 per cent of bilge and ballast discharge is petroleum.