Quantify fuel and CO₂ avoided by reducing speed on a leg so that the ship arrives at the pilot-station at the agreed time instead of steaming flat-out and then waiting at anchor.
VoyageJITPort call
Scheduled leg
Fuel rates
JIT speed
12.12kn
Fuel saved
33.29t
CO₂ saved
103.66t
Formula, assumptions, and limits
JIT converts what would have been anchor time into useful steaming time at a lower speed. Main-engine fuel falls cubically; auxiliary burn is broadly unchanged whether the ship is at anchor or steaming, so the AE term is small.