CII for container ships with significant reefer plug capacity. Uses container_ship reference (a=1984, c=0.489) - but reefer aux load typically adds 10–25 % to aux-engine fuel, pushing CII up unless offset by higher capacity utilisation or low-carbon fuel.
Ship typeContainerReefer
Ship & voyage
Fuel
Include aux-engine fuel for reefer plug loads in the MGO row (or the aux fuel used).
Attained CII
9.660g CO₂ / (dwt·nm)
Required CII
8.319g CO₂ / (dwt·nm)
Rating
D
Minor inferior - corrective plan required after three consecutive years.
Formula, assumptions, and limits
Reefer plug load at 3.5 kW per TEU × 1,000 active plugs ≈ 3.5 MW continuous = 420 t/year extra MGO. Measurable effect on CII. Cold-ironing at reefer-busy ports can offset 15–25 % of that.