Eastbound tanker voyage from Tubarão to Port Louis, 20 days, 5,514 nm – across the South Atlantic, round the Cape of Good Hope, across the southern Indian Ocean. September 2023. The lane runs entirely through the Southern Ocean's high-sea-state corridor; the historical replay spent 100% of the voyage at Sea State 4+ and 13.7% at Sea State 6+ (≥4 m), with a 6.09 m peak just south-west of the Cape. The optimised track cut Sea State 6+ exposure to 1.3%, a 10% reduction, and Sea State 5+ exposure from 62.4% to 40.9%. Peak wave encounter dropped from 6.09 m to 4.29 m, and the peak itself relocated: from the Cape's stormiest zone to a milder corridor south-east of Madagascar. Mean SOG 11.6 kn. The result was a 14.34% FOC saving (84 MT), outside any ECA, so a clean routing-and-weather management saving rather than a fuel-grade effect.
How the voyage performed across wave height and Douglas Sea State exposure — recorded waypoint-by-waypoint.
Waypoint-by-waypoint against the historical AIS baseline.
The historical AIS track was pulled from public records and matched against the master’s own reports. The VF Engine then re-routed the same vessel under the weather as it actually occurred — not a forecast. Both tracks were scored by the same FOC prediction model and compared waypoint by waypoint. The 14.34% reduction is the delta sailed at the same speed band, under the same wind and wave conditions.
Read the full validation methodologyClosed beta admits operators on a rolling basis. The trial voyage is free.
Essential for the site to function correctly. Cannot be disabled.
Google Analytics (GA4) helps us understand how visitors navigate the site. No personally identifiable information is collected.
Google Ads cookies help us measure the effectiveness of our campaigns. Used to attribute conversions and optimise ad spend.