The Port of Rotterdam reports 2012 fuel oil bunker volume fell from 11.6 to 10.3 million tonnes. The Port of Rotterdam Authority attributes the decline as a whole to the more efficient way of sailing adopted by shipping (‘super slow steaming’). However, gas oil bunkering increased slightly; from 530,000 to 550,000 tonnes. Container vessels account for almost half of the close on 23,000 bunkers sold and three-quarters of the total quantity of fuel oil bunkered. Container shipping sails more efficiently nowadays…