The Carbon Intensity Indicator rates a vessel from A to E on how much CO₂ it emits per tonne-mile, and the required thresholds tighten each year. Operational efficiency is the fastest route to a better rating.

Operational levers

  • Optimize speed — the cubic fuel curve makes modest speed cuts disproportionately effective.
  • Route for conditions, not just distance, to cut burn per mile.
  • Keep hull and propeller clean to remove added resistance.
  • Use just-in-time arrival to avoid steaming hard then waiting at anchor.

Because the same levers that cut fuel cut carbon, NAVGreen’s route optimization improves voyage economics and CII at the same time — and live monitoring tracks the rating trend across the year.