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 our 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, which are despatched directly from the UKHO.
View the guidance notes for Notices to Mariners here.
Updating your Admiralty Charts - a film guide to using Notices to Mariners
The UKHO has produced a series of helpful film based guides on to how to update your Admiralty charts. The films also include a look at some useful tools to help you carry out these tasks.
The films can be found on our YouTube channel here.
Admiralty Notices to Mariners Online
The Admiralty Notices to Mariners Online service enables mariners to download NMs directly from this website.
To access NMs Online, select the appropriate tabs on this page.
Searchable NMs Database
The UKHO's searchable NMs database, known as NM Websearch, allows users to to search by Chart number for NM text, full colour NM Blocks and Notes.
To use NM Websearch, click here, or go to: www.nmwebsearch.com.
Additional Notices to Mariners Services
For the latest information regarding update status of UK ENC cells in relation to UKHO NMs please click here.
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.
Pricing of Notices to Mariners (NMs)
|Weekly Notices to Mariners
||£2.20 per copy
|Cumulative List of Admiralty Notices to Mariners (NP 234A and NP 234B)
||£5.00 per copy
|Annual Summary of Admiralty Notices to Mariners (NP 247) (paper version - parts 1&2)
|Notices to Mariners Web Services
|Searchable Notices to Mariners Web Service
Official Status of Admiralty Notices to Mariners
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 220.127.116.11 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.
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