Conversion Tonnage Reduction Coefficient (j)

In the EEDI calculation, fj is the power correction factor for ship-specific design elements, set in the 2014 attained-EEDI guidelines MEPC.245(66). Its default value is 1.0. For Finnish-Swedish ice-class notations it takes the tabulated value below 1.0 that credits the extra installed power an ice-strengthened hull needs, and for shuttle tankers with propulsion redundancy it is 0.77. The ice-class fj can be multiplied with a ship-type fj for ice-classed general cargo, ro-ro cargo, and ro-ro passenger ships. fj sits in the attained-EEDI denominator path and lowers the attained index toward the required value for these designs.