As a mariner, you need reliable data for safe navigation. Therefore, the Hydrographic Service publishes nautical charts and nautical publications. Since the situation at sea changes continuously, you are required to keep these products up to date. You can do so by using the Notices to Mariners (NtMs). In the 'NtMs-database' you can select the changes to each nautical chart by week number or chart number. You can also incorporate the changes by means of a weekly downloadable file on the page 'Overview weekly editions'. Nautical publications are published on the page Nautical publications. If the product has been updated, this will be reported in a NtM. The specific changes can be found in the record of amendments of the publication.
Do you see uncharted dangers, changes or errors in nautical chart or publication? Please report them using the contact form.