Transition from NAP to LAT in the outer harbours of IJmuiden
2025/43
From
01 Jul 2025
Area - Lock
As of 1 July 2025 at 12:00LT hours, the reference level LAT will be used in the outer harbours of IJmuiden. Depth data will be published relative to LAT. Water levels will also be provided relative to LAT from that date onward.
During lock operations and sluice control, the chart datum NAP will continue to be used.
Chart datum for the North Sea Channel and harbours an channels in open connection will remain NAP.