CII for Very Large Ore Carriers and combination carriers. MEPC.337 combination-carrier reference (a=40853, c=0.812). Narrow d-boundaries reflect the tight size and trade-pattern cluster of iron-ore trades.
Ship typeOreVLOC
Ship & voyage
Fuel
Attained CII
1.896g CO₂ / (dwt·nm)
Required CII
1.490g CO₂ / (dwt·nm)
Rating
E
Inferior - SEEMP Part III corrective action plan required.
Formula, assumptions, and limits
Combination carrier d-boundaries: d1=0.87, d2=0.96, d3=1.06, d4=1.14. The high c exponent (0.812) means Required CII drops steeply with capacity - large VLOCs have easy absolute targets but tight bands on rating.