Overview by week
To support safe navigation, the Hydrographic Service publishes the most important changes to nautical products. It does so by posting Notices to Mariners (NtMs) in the NtMs-database. You can select the NtMs per week below. You can also view the NtMs per chart.
First read the explanatory notes.
Note: Due to the corona measures, the Notices to Mariners will be published every 2 weeks from week 18/20 until further notice.