Bunkers are the single largest controllable cost on most voyages, and small percentage savings compound across a fleet and a year. The good news: most fuel waste comes from a handful of fixable factors.
Seven levers that move the needle
- Speed — fuel rises roughly with the cube of speed, so eco speed is the biggest single lever.
- Weather routing — avoiding adverse currents and seas can save more than slowing down.
- Trim optimization — the right trim for draft and speed reduces resistance.
- Hull and propeller cleanliness — fouling silently adds double-digit percentages.
- Just-in-time arrival — slowing to a confirmed berth window beats waiting at anchor.
- Auxiliary load management — shaving idle generator and boiler load.
- Accurate performance data — you cannot cut what you do not measure.
NAVGreen’s route optimization balances ETA, fuel and safety across these levers at once, then live monitoring confirms the savings actually landed on the voyage rather than just on the plan.