Container Ship CII
CII for container ships - feeder, Panamax, Neo-Panamax, Post-Panamax, ULCV. MEPC.337 container reference (a=1984, c=0.489). Lower c than bulker/tanker - required CII drops more slowly with capacity, so larger ships don't get a disproportionate advantage.
Ship & voyage
Fuel
Modern ULCVs often dual-fuel LNG or methanol (CMA CGM, Maersk); others VLSFO + scrubber.
Attained CII
6.941g CO₂ / (dwt·nm)
Required CII
6.645g CO₂ / (dwt·nm)
Rating
C
Moderate performance. Compliant.
Formula, assumptions, and limits
Container d-boundaries: d1=0.83, d2=0.94, d3=1.07, d4=1.19. Container ships face particularly tight CII pressure because liner schedules constrain slow-steaming - most operators are adding ships to loops rather than slowing existing ones.