--- title: How Syroco Live cut a tanker's fuel consumption by 17.5% on a South Atlantic crossing description: A tanker routed by Syroco Live saved 17.5% fuel on a South Atlantic crossing, arriving on schedule. Results measured on board using a DNV-verified method. image: https://syro.co/hubfs/final.png --- [Skip to content](https://syro.co/news/how-syroco-live-cut-a-tankers-fuel-consumption-by-17.5-on-a-south-atlantic-crossing#main-content) [![logo\_syroco\_transparent-1](https://syro.co/hs-fs/hubfs/logo_syroco_transparent-1.png?width=150&height=33&name=logo_syroco_transparent-1.png)Homepage](https://syro.co) - PLATFORM - [Syroco Live](https://syro.co/syroco-live) - [Technology](https://syro.co/technology) - [Syroco Onwatch](https://syro.co/syroco-onwatch) - WHY SYROCO - [Benefits](https://syro.co/benefits) - [Results](https://syro.co/results) - WHO IT'S FOR - [Executives](https://syro.co/executives) - [Fleet managers & Ops](https://syro.co/fleet-managers-ops) - [Captains](https://syro.co/captains) - [NEWS](https://syro.co/news) - [COMPANY](https://syro.co/company) [BOOK A DEMO](https://syro.co/demo) - PLATFORM - [Syroco Live](https://syro.co/syroco-live) - [Technology](https://syro.co/technology) - [Syroco Onwatch](https://syro.co/syroco-onwatch) - WHY SYROCO - [Benefits](https://syro.co/benefits) - [Results](https://syro.co/results) - WHO IT'S FOR - [Executives](https://syro.co/executives) - [Fleet managers & Ops](https://syro.co/fleet-managers-ops) - [Captains](https://syro.co/captains) - [NEWS](https://syro.co/news) - [COMPANY](https://syro.co/company) [BOOK A DEMO](https://syro.co/demo) ![](https://syro.co/hs-fs/hubfs/final.png?width=1670&height=941&name=final.png) # How Syroco Live cut a tanker's fuel consumption by 17.5% on a South Atlantic crossing ![Syroco](https://7528315.fs1.hubspotusercontent-na1.net/hub/7528315/hubfs/raw_assets/public/mV0_d-cms-elevate-theme_hubspot/elevate/images/avatar-placeholder.jpg?width=48&height=48&name=avatar-placeholder.jpg) Syroco November 10, 2026 *In late August 2026, a product tanker routed by Syroco Live sailed from Walvis Bay to Montevideo using 17.5% less fuel than its initial passage plan. That is 61.7 tonnes saved on a single crossing, calculated from the fuel measured on board, with the vessel still arriving on schedule.* ## **The results** ![](https://syro.co/hs-fs/hubfs/undefined-4.png?width=694&height=286&name=undefined-4.png) On this crossing alone, that is around 190 tonnes of CO₂ avoided. ## **Holding an arrival time at the lowest fuel cost** The vessel sailed in[Just In Time Arrival (JITA)](https://syro.co/news/multi-objective-weather-routing) mode over 99.9% of the crossing. The arrival time is set in advance, and the routing looks for the lowest fuel consumption that still meets it. There is no point pushing the engine to[arrive early and wait at anchor](https://syro.co/news/why-arriving-early-can-cost-you-as-much-fuel-as-arriving-late). Over almost 12 days at sea, meeting that target at the lowest cost means responding to weather that rarely stays as forecast at departure. That is exactly what happened on this voyage. ## **A storm south of the route** In the first days, harsh and then critical weather was flagged along the route, and the alerts cleared as the vessel moved away from the system. The real test came mid-crossing, with a storm to the south. The initial plan dipped to 36°S, straight through it. The vessel, following Syroco Live's optimised route, held near 29°S. At the height of the storm, the initial plan would have met waves of up to 5.6 m, against 4.8 m for the vessel. Over the whole voyage, the reference would have spent 37 hours in bad weather. The vessel spent 14. ## **Where the 17.5% comes from** A ship burns fuel first to overcome the resistance it meets from waves, wind and current. Every share of that resistance avoided turns directly into fuel saved. On this crossing, 70% of the saving (43.2 t) came from waves avoided: the vessel had the sea on the bow 30% of the time, against 48% for the reference. Wind accounts for 22% (13.6 t), with the apparent wind on the bow 35% of the time against 59%. Current provides the remaining 8% (4.9 t), as the vessel had a propulsive current twice as often as the reference. The engine tells the same story. As the storm passed, the initial plan would have lost speed at the same engine setting and burnt about 30% more fuel than the vessel. Clear of the system, the vessel could ease its engine and still arrive on time. Around three quarters of the saving was made during and just after the storm. ## **What happened on board** The work started before departure. The[Onwatch](https://syro.co/syroco-onwatch) team obtained the master's passage plan and set it up in the application. The voyage was live from departure, and the crew received their voyage briefing the same day. During the crossing, the bridge refreshed the optimisation 1.5 times a day on average. It accepted 94% of the proposed routes and exported five of them to the ECDIS. All route and RPM recommendations came from the vessel’s [digital twin](https://syro.co/technology), a physics-based model recalibrated about once a month from sensor data. The master always kept the final decision. The crew followed the recommended route 98% of the time and the speed profile 100% of the time. The vessel was never flagged off route during its 12 days at sea. ## **How the 17.5% is measured** Fuel consumption on the actual voyage is measured on board: 290.2 tonnes. The reference route links the same two ports. It is simulated with the same digital twin, in the same weather, and its fuel consumption is corrected with the same ratio between measured and modelled fuel. The actual voyage is rebuilt from the vessel's AIS positions. The split between waves, wind and current compares, day by day, the conditions met by the vessel and by the reference. Savings calculated using a methodology[independently verified by DNV](https://syro.co/news/dnv-verifies-syrocos-method-for-estimating-savings-from-voyage-optimisation). ## **Conclusion** A 17.5% fuel saving on a single crossing, with the same arrival time, is well above the 10% fuel savings figure Syroco usually highlights. Behind it is a storm identified early and kept at a distance, and a crew that followed the recommendations day after day, easing the engine as soon as the sea allowed. ## Share this post [mailto:https%3A%2F%2Fsyro.co%2Fnews%2Fhow-syroco-live-cut-a-tankers-fuel-consumption-by-17.5-on-a-south-atlantic-crossing](mailto:https%3A%2F%2Fsyro.co%2Fnews%2Fhow-syroco-live-cut-a-tankers-fuel-consumption-by-17.5-on-a-south-atlantic-crossing) ## Keep reading ### [![](https://syro.co/hs-fs/hubfs/PR%20EuroAfrica%20%20(1).png?width=1254&height=1254&name=PR%20EuroAfrica%20%20(1).png) EuroAfrica extends Syroco Live from pilot vessel to its full fleet after ESL Australia trial](https://syro.co/news/euroafrica-extends-syroco-live-from-pilot-vessel-to-its-full-fleet-after-esl-australia-trial) ### [![](https://syro.co/hs-fs/hubfs/H%C3%A9lice%20marine%20en%20analyse%20CFD%20multicolore.png?width=1501&height=1048&name=H%C3%A9lice%20marine%20en%20analyse%20CFD%20multicolore.png) Why your propeller curve matters, and how we estimate it when it’s missing](https://syro.co/news/why-your-propeller-curve-matters-and-how-we-estimate-it-when-its-missing) --- [![logo\_syroco\_white\_orange](https://syro.co/hs-fs/hubfs/logo_syroco_white_orange.png?width=141&height=31&name=logo_syroco_white_orange.png "logo_syroco_white_orange")](https://syro.co/) Driving the energy transition of maritime - [PLATFORM](https://syro.co) - [Syroco Live](https://syro.co/syroco-live) - [Syroco Onwatch](https://syro.co/syroco-onwatch) - [Results](https://syro.co/results) - [The Technology](https://syro.co/technology) - [COMPANY](https://syro.co/company) - [Careers](https://syro.co/company#careers) - [Contact](https://syro.co/contact-us#contact) --- [Privacy Policy](https://syro.co/privacy) · [Content Usage Policy](https://syro.co/content-usage-policy) · © 2026 Syroco, all rights reserved. ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Syroco", "url" : "https://syro.co/news/author/syroco" }, "dateModified" : "2026-11-10T08:43:19.674Z", "datePublished" : "2026-11-10T08:43:19.000Z", "headline" : "How Syroco Live cut a tanker's fuel consumption by 17.5% on a South Atlantic crossing", "image" : [ "https://syro.co/hubfs/final.png" ], "mainEntityOfPage" : { "@id" : "https://syro.co/news/how-syroco-live-cut-a-tankers-fuel-consumption-by-17.5-on-a-south-atlantic-crossing", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://syro.co/hubfs/logo_syroco_transparent-1.png" }, "name" : "Syroco" } } ```