--- title: How we cut a ship's fuel by 12.4% - without changing distance or losing time description: A container vessel burned 12.4% less fuel on the same voyage, at the same speed. Here's where the saving came from - and how it's measured. image: https://syro.co/hubfs/1786024001699.jpeg --- [Skip to content](https://syro.co/news/how-we-cut-a-ships-fuel-by-12.4-without-changing-distance-or-losing-time#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/1786024001699.jpeg?width=1200&height=1200&name=1786024001699.jpeg) # How we cut a ship's fuel by 12.4% - without changing distance or losing time ![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 August 6, 2026 Tell a shipowner you cut 12.4% of a voyage's fuel, and the first question is always the same: what did you give up? A slower speed? A shorter route? Something usually has to pay for it. On a recent crossing from Guadeloupe to mainland France, a container vessel did exactly that. Around 12 days at sea, and it gave up nothing. So here's exactly what happened, and how we know. ## **Start with the number** ![Capture décran 2026-07-29 144717 (4) (3)](https://syro.co/hs-fs/hubfs/Capture%20d%C3%A9cran%202026-07-29%20144717%20(4)%20(3).png?width=1336&height=531&name=Capture%20d%C3%A9cran%202026-07-29%20144717%20(4)%20(3).png)*Reference: the vessel's original planned route. Actual: the same voyage, routed by Syroco.* The table reads in one line: fuel dropped 12.4% (133.2 → 116.8 mt), while distance and duration barely moved. That's the result - but a number only counts once you know what it's measured against. ## **Measured against what, exactly?** A saving only means something once you know what it's compared to. The reference here is the route the vessel was set to sail before we routed it: its own planned voyage. Syroco's digital twin rebuilds both that reference and the route actually sailed, and compares them between the same two ports. Because both run through the same model, the comparison is like-for-like. That also means the 12.4% is an estimate, not a meter reading - a reference voyage never physically happened, so it has to be modelled. Which is why the method matters more than the number. [DNV](https://syro.co/news/dnv-verifies-syrocos-method-for-estimating-savings-from-voyage-optimisation) independently reviewed and verified that method: how Syroco builds the reference and compares it to the real one. Not this specific figure - the method behind it. ## **So if the distance and speed didn't change, where did the fuel actually go?** ![Design sans titre (29) (2)](https://syro.co/hs-fs/hubfs/Design%20sans%20titre%20(29)%20(2).png?width=1127&height=632&name=Design%20sans%20titre%20(29)%20(2).png) *The saving, split by cause. From distance: 0%.* *None of it came from distance - the two routes are the same length. It came from what the ship met along the way: wind (~6.8%), sea state (~5.0%) and current (~0.6%).* Think of two swimmers crossing the same river at the same pace - one with the current, the other one against it. Same distance, right? But very different effort. A ship is not different: at a given speed, fuel is burned by resistance, not by distance. So our routing looks for the crossing where the ocean works with the ship. Same length on the chart - less fuel in the tank. ## **From one voyage to a fleet** The number will move from one voyage to the next. The method won't. That's the whole point. One crossing is a case study. Across a fleet, over a year, it's a strategy. ## Share this post [mailto:https%3A%2F%2Fsyro.co%2Fnews%2Fhow-we-cut-a-ships-fuel-by-12.4-without-changing-distance-or-losing-time](mailto:https%3A%2F%2Fsyro.co%2Fnews%2Fhow-we-cut-a-ships-fuel-by-12.4-without-changing-distance-or-losing-time) ## Keep reading ### [![](https://syro.co/hs-fs/hubfs/Design%20sans%20titre%20(8).png?width=2048&height=1076&name=Design%20sans%20titre%20(8).png) How OnWatch helped a crew choose the safer route, not just the shortest one ?](https://syro.co/news/how-onwatch-helped-a-crew-choose-the-safer-route-not-just-the-shortest-one) ### [![](https://syro.co/hs-fs/hubfs/Draft_Picture_2%20(2).jpg?width=2048&height=1387&name=Draft_Picture_2%20(2).jpg) Meet Chloé, Head of Data Science at Syroco](https://syro.co/news/meet-chlo%C3%A9-head-of-data-science-at-syroco) --- [![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/news/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) - [Key Benefits](https://syro.co/benefits) - [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" : "2026-09-16T13:16:33.150Z", "datePublished" : "2026-08-06T13:23:57.000Z", "headline" : "How we cut a ship's fuel by 12.4% - without changing distance or losing time", "image" : [ "https://syro.co/hubfs/1786024001699.jpeg" ], "mainEntityOfPage" : { "@id" : "https://syro.co/news/how-we-cut-a-ships-fuel-by-12.4-without-changing-distance-or-losing-time", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://syro.co/hubfs/logo_syroco_transparent-1.png" }, "name" : "Syroco" } } ```