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*,**Training Ship, Mokpo National Maritime University, Mokpo, 530-729, Korea***Graduate school of Korea Maritime University, Busan, 606-791, Korea  :      , , ,      ,    50~60%    .                .          . ,         ,             70%    . : , , , , Abstract : Operation Abstract : Operational cost required for navigating a ship may differ from according to type, scale, economic speed, navigation area and other factors. However, it is known that the fuel oil price ratio takes 50~60%. It is the current trend because of the use of poor quality fuel and it is reviewed even for small to medium sized ships to save the operational costs due to the recent rise of international oil price. Furthermore, ocean carriers are taking action to low speed navigation as the alternative method of reducing fuel consumption. Hence, in this study, fuel consumption of main engine was measured by using actual operating ship data compared with sea speed at sea. It was suggested that the area of M/E's load(70%) lower than NCR is the optimal navigating condition through the relation between speed and fuel consumption compared with advance ratio together with the load.Key words : Fuel oil consumption, Advance ratio, Actual ship, Main engine, NCR(Normal Continuous Service Rating)

A Study on Economical Operation of a Ship's Main Engine - The case of Training Ship SAENURI -