ADMIRALTY Notices to Mariners (NMs)

Admiralty Charts and Publications should be maintained so that they are fully up-to-date for the latest safety-critical navigational information. The Admiralty Notices to Mariners service provides all of the data you need to maintain the products.

Admiralty NMs contain all the corrections, alterations and amendments for the UKHO's worldwide series of Admiralty Charts and Publications. They are published weekly in several formats but best known as the weekly booklets.

In addition to Weekly Notices to Mariners, the UKHO produces the following supplementary NM Publications:

  • Annual Summary of Notices to Mariners
  • Notices to Mariners Block Corrections
  • Notices to Mariners Tracings

Guidance on how to apply the corrections contained within NMs to Admiralty Charts can be found in NP294 - 'How To Keep Your Admiralty Products Up-To-Date'.

To enable mariners to keep a neat and formal record of all the NMs applied to a vessel's portfolio of charts, the UKHO recommends use of NP133A - Paper Chart Maintenance Record.

The Admiralty Notices to Mariners weekly bulletin is published by the UKHO. The UK Maritime & Coastguard Agency (MCA) accepts that both the paper and digital forms of the NM weekly comply with carriage requirement for Notices to Mariners within Regulation of the revised Chapter V of the Safety of Life at Sea (SOLAS) Convention, and the Merchant Shipping (Safety of Navigation) Regulations, both of which came into force 01 July 2002.