Jarle Coll Blomhoff, Business Development Leader, Maritime Advisory Germany & East Med, DNV GL Maritime presentation during the 2015 GREEN4SEA Forum Fuel efficiency has become a key differentiator for shipping companies, and fuel bill often make up more than half of total cost of operation. There are two main drivers for improving efficiency of a tanker; changing the design of the vessel, and reduce efficiency losses by improving operation. I will talk about the topic of operational fuel efficiency for tankers. It will be based on our experience working together with several companies from various vessel segments; however also briefly looking at the fuel efficiency projects we are doing together with Euronav here in Piraeus, Antwerp & London.  The first question to ask yourself should be ‘’ what is the actual bunker consumption of your fleet?’’ A typical example; a VLCC consumes approx. 17,000 ton/year. It used to be 10 million per year at 600 USD/ton, at the moment is more close to 5 million per year at 300USD/ton. I believe that in few years, this value is about to rise. The next question is ‘’what is the impact it has on the operation of your company?’’  There are three different impacts:...