Ro-Ro Vehicle Carrier (PCTC) CII
CII for Pure Car and Truck Carriers. MEPC.337 uses GT (not DWT) as capacity basis - reflects the low-density vehicle cargo. Reference line a=5739, c=0.631. Large PCTCs (8,000+ CEU) face tight rating bands under the MEPC.339 roro-cargo-vehicle d-vector.
Ship & voyage
Fuel
Attained CII
6.920g CO₂ / (GT·nm)
Required CII
4.382g CO₂ / (GT·nm)
Rating
E
Inferior - SEEMP Part III corrective action plan required.
Formula, assumptions, and limits
PCTC d-boundaries: d1=0.86, d2=0.94, d3=1.06, d4=1.16. Like bulkers, the tight bands reflect uniform trade routes (Pacific + Europe <=> US, Asia routes).