An “Uplift Term” was agreed in c/p (NYPE) under which Owners would supply an additional 200-300 mt delivery bunkers, against increased hire. Owners subsequently supplied 195 mt. Charterers sought a declaration that the minimum quantity had not been supplied and the “Uplift Term” not triggered, whilst Owners argued the “Additional Requirements” clause (defining “abt” as +/- 5%) was applicable. The Tribunal agreed with Owners; the parties intended “abt” to qualify all bunker quantities, its omission a clear mistake the Tribunal had power to correct, and its inclusion necessary for business efficacy.