HomeCalculatorscgDIST - CO₂ per gross-tonnage nautical mile

cgDIST - CO₂ per gross-tonnage nautical mile

Compute cgDIST - the operational CO₂ intensity metric used by ro-pax, ro-ro vehicle carriers, and cruise ships, where gross tonnage is a better capacity basis than deadweight.

IMOOperationalcgDIST

Ship & voyage

Gross tonnageGTPassenger, ro-pax, ro-ro vehicle carriers, and cruise ships use GT as the capacity basis in MEPC.337(76).Distance travellednm

Annual fuel consumption

FuelMass burnedt

cgDIST

3.114gCO₂ / (GT·nm)

Total 62.3 kt CO₂.

Formula, assumptions, and limits

cgDIST = Σⱼ (Fⱼ × Cfⱼ × 10⁶) / (GT × Distance)

Identical math to AER but with GT in the denominator instead of DWT. For a cruise ship of GT 100,000 burning 20 kt VLSFO over 200,000 nm, cgDIST ≈ 3.1 gCO₂/(GT·nm).