This dashboard puts all four marine fuel candidates on screen at once instead of following a single ship. The top bar chart compares the range each fuel gives a ship of the chosen tank size and speed, since fuels differ in energy density (energy stored per litre). The middle strip is a top-down voyage map: your selected fuel's ship sails across it while its tank gauge drains and its exhaust plume shade reflects carbon intensity. The bottom chart is the IMO glide path — the regulatory ceiling on greenhouse-gas intensity from 2024 to 2050 — with a dot for every fuel's current intensity, so you can see at a glance which fuels already clear the bar and which need a bigger green-production share.
power(v) ∝ v³
range = tank_energy / (k · v²)
intensity = grey_intensity · (1 − green%) + green_intensity · green%
compliant = intensity ≤ IMO_target(year)
- Range bars — recomputed live for all four fuels as you move the speed and tank sliders, so you can compare trade-offs without switching fuel.
- Green production share — blends in a renewable production pathway for whichever fuel is selected for the voyage map, cutting its carbon intensity without changing its energy density.
- IMO glide-path chart — every fuel's dot moves down as its green share rises; a dot below the line at the chosen target year is compliant.
- Cruising speed — shrinks range for every fuel simultaneously, because propulsion power scales with speed cubed.
Real-world relevance: shipping's 2050 net-zero pathway is exactly this multi-fuel trade-off — no single molecule wins on both energy density and carbon intensity, so operators pick per-route based on range needs versus compliance deadlines.