Every hour a vessel sits at anchor, the meter is running. Not slowly, not invisibly, but across five simultaneous cost layers that compound in real time. For vessels and shipping companies operating in European waters, 2026 marks a turning point: the EU Emissions Trading System now covers 100% of verified emissions from EU port calls, adding a carbon invoice to a bill that was already substantial.
This article breaks down what one hour at anchorage actually costs, by vessel class, across each cost layer, and explains why the calculation is more urgent today than it has ever been.
The meter is always running
Anchorage feels like a pause. The voyage is over, the berth is almost ready, the cargo operations are close. But from a commercial and operational standpoint, a vessel at anchor is not pausing, it is spending. Charter rate exposure does not stop at the pilot boarding place. Auxiliary engines burn fuel to maintain power, lighting, ventilation and safety systems. The demurrage clock may already be ticking. And from 1 January 2026, every tonne of CO₂ emitted while waiting carries a real monetary cost under the EU ETS.
Operators who have run the numbers already know this intuitively. The goal of this article is to make the calculation explicit, so that the cost of anchorage time can be weighed against the cost of the coordination tools that reduce it. (....)