“24. Owners warrant that at the date of delivery under this charter the vessel shall be of the description set out in Gas Form C attached hereto and signed by them and undertake to use their best endeavours so as to maintain the vessel during the period of her service hereunder. Further but otherwise without prejudice to the generality of this clause Owners guarantee that the average speed of the vessel will be not less than knots in ballast and knots fully laden, with a maximum bunker consumption of tons diesel oil/ tons fuel oil per day for all purposes excluding cargo heating and tank cleaning. See Additional Clause 42 attached which also overrides any references to overperformance herein. … If during any year from the commencement of the charter period the vessel falls below or exceeds the performance guaranteed in this clause then … (b) If such shortfall or excess results respectively from an increase or a decrease in the vessel’s average daily bunker consumption, as herein defined, in relation to the average daily consumption guaranteed hereunder, hire shall be reduced or increased as may be appropriate by an amount equivalent to the value of the excess or saving in bunkers involved based on the average price paid by Charterers for the vessel’s bunkers in this period.”
“The decrease in consumption is that ascertained by reference to the figure inserted in the earlier part of clause 24 and is therefore in the present case a figure of 42 tons.”
“a contract where quantities expressed as maxima are used as the basis for adjustments whether the actual consumption exceeds or falls short of the guarantee.”