Unlocking Major Fuel Savings through Just-in-Time Arrival

A recent study conducted by the UCL Bartlett Energy Institute and UMAS has shed light on the potential energy savings that could be achieved in the shipping industry through the practice of just-in-time arrival. This strategy involves optimizing voyage speed to match berth availability, ultimately reducing fuel consumption and emissions. The study found that the fuel savings from just-in-time arrival could be significant, comparable to implementing wind-assisted propulsion or an air lubrication system, but without the need for any additional capital investment.

Ships currently spend up to six percent of their operating time at anchor while waiting to berth, running auxiliary engines and emitting pollutants. This inefficiency is partly driven by contractual incentives for “sail fast and wait” practices in charter parties, as well as first-come/first-served operations at some terminals. By slowing down mid-voyage and arriving on time to proceed directly to berth, vessels practicing just-in-time arrival can increase efficiency through slow steaming and avoiding idle time at anchor.

To encourage the adoption of just-in-time arrival practices, cooperation among various stakeholders, including charterers, is essential. The study suggests that the International Maritime Organization (IMO) could play a role in promoting these efficiencies by considering in-port emissions in the Carbon Intensity Indicator (CII) regulation. By addressing idle periods at ports, significant emissions reductions could be achieved, particularly in the container, oil, and chemical tanker sectors. The potential industry-wide savings in CO2 emissions could amount to millions of tonnes per year, translating into billions of dollars in bunker fuel savings globally.

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