The heavy fuel oil and diesel oil capacities including service and settling tanks (but excluding overflow), assuming an LHV of 10,200 kcal/kg are to be dimensioned for about 5,000 Nm or 14 days cruising at a speed of 18 knots at a draught of 8.25 m, with a sea margin of 25% and a hotel load of 12,800 kW, plus a reserve of 1,000 Nm with the same hotel load, plus unpumpables (3%).