Ship & voyage Capacity units Whatever capacity metric is appropriate for the comparison - DWT, GT, TEU, lane-metre, etc. Denominator units must match between fleet comparisons. Distance travelled nm Annual fuel consumption Fuel Heavy Fuel Oil (HFO / RMC..RMK) Very Low Sulphur Fuel Oil (VLSFO, ≤0.50% S) Ultra Low Sulphur Fuel Oil (ULSFO, ≤0.10% S) Light Fuel Oil (LFO / RMA, RMB) Marine Gas Oil (MGO / DMA, DMZ) Marine Diesel Oil (MDO / DMB) LNG - Otto cycle, medium-speed (4-stroke dual-fuel) LNG - Otto cycle, slow-speed (2-stroke low-pressure) LNG - Diesel cycle, slow-speed (2-stroke high-pressure) LPG - Propane LPG - Butane Methanol - grey (natural-gas feedstock) Bio-methanol e-Methanol (RFNBO from renewable H2 + captured CO2) Ammonia - grey (steam-methane reforming) Ammonia - blue (SMR + CCS) Ammonia - green (electrolytic, renewable) Hydrogen - grey (SMR) Hydrogen - green (renewable electrolysis) Bio-LNG (liquefied biomethane, waste feedstock) FAME biodiesel (B100, waste feedstock) HVO / Renewable Diesel (waste feedstock) Mass burned t ×
+ Add fuel cbDIST
2.373 gCO₂ / (unit·nm)
Total 7.8 kt CO₂.
Formula, assumptions, and limits cbDIST = Σⱼ (Fⱼ × Cfⱼ × 10⁶) / (Capacity × Distance) Same math as AER and cgDIST with a generic capacity denominator. Useful for internal fleet dashboards where ships span multiple capacity bases.