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 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 support films to help you update your ADMIRALTY charts. The films, which are hosted on our YouTube channel, also include a look at some useful tools to help you carry out these tasks.
Watch the support films >
New Notices to Mariners tracings
Please see our publication 'How to keep your ADMIRALTY Products Up-to-Date (NP294)' 10th Edition, published 1 June 2017 for further information.
View the overview of new Notices to Mariners tracings
View the quick guide to Notices to Mariners tracings
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 you to search by chart number for NM text, full colour NM blocks and notes.
Access NM Websearch >
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 (NP247)
Notices to Mariners Block Updates
Notices to Mariners Tracings
Guidance on how to apply the updates contained within NMs to ADMIRALTY Charts can also be found in NP294 - 'How To Keep Your ADMIRALTY Products Up-to-Date'.
To help you keep a neat and formal record of all the NMs applied to a vessel's portfolio of charts, the UKHO recommends use of Paper Chart Maintenance Record (NP133A)
Pricing of ADMIRALTY Notices to Mariners (NMs)
Cumulative List of ADMIRALTY Notices to Mariners (NP234A and NP234B) - £5.70 per copy
Annual Summary of ADMIRALTY Notices to Mariners (NP247) (paper version - parts 1 and 2) - £8.40 per copy
Notices to Mariners Web Services - Free
Searchable Notices to Mariners Web Service - Free
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 1 July 2002.
Reproducing ADMIRALTY Notices to Mariners
ADMIRALTY Notices to Mariners (NM) are British Crown Copyright; resale of all or parts of the NMs is prohibited without written permission from UKHO. To apply for permission, please contact: email@example.com. Please note that permission will only be granted subject to completion of an assessment.