where
K1 = 0.015 for vessels where heavy fuel oil is purified for main engine use or
= 0.005 for vessels using diesel oil or heavy fuel oil which does not require purification before
use
C = daily fuel oil consumption, m3 (ft3)
D = maximum period of voyage where sludge can be discharged ashore (days). In the absence of precise data, a figure of 30 days is to be used.