Bunker A, B, C
The Australian Customs and Australian Tax Office define a bunker fuel as the fuel that powers the engine of a ship or aircraft.Bunker A is No.2 fuel oil, bunker B is No.4 or No.5 and bunker C is No.6. Since No.6 is the most common, “bunker fuel” is often used as a synonym for No.6 No.5 fuel oil is also called Navy Special Fuel Oil (NSFO) or just navy special; No.5 or 6 are commonly called heavy fuel oil (HFO) or furnace fuel oil(FFO); the high viscosity requires heating, usually by recirculated low pressure steam system, before the oil can be pumped from a bunker tank.
Bunker are rarely labeled this way in modern maritime practice
Pricing Methods
Pricing methods for fuel oil, Like other oil products fuel oil has individual plants rates for each region. For example we determine fuel oil cst 380 price from Persian Gulf platts price for 180 plus or minus premium rate.Like LPG and other oil product premium rate shall be different there are affecting factors like seasons of the year, amount of refinery production sulfur content and so on…