The United Kingdom Hydrographic Office

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.

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 Charts 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 - Chart Correction Log.

Pricing of Notices to Mariners (NMs)

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 19.2.1.4 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.

Download the Chart Availability List

View the ENC Cell Update List 

Cumulative List of Admiralty Notices to Mariners

The Cumulative List of Admiralty Notices to Mariners (NP234 A/B) assists users who wish to identify outstanding NMs and audit trails for a particular chart or charts. The list is published annually, with Part A in January and Part B in July.

The Cumulative List of Admiralty Notices to Mariners is available without subscription from Admiralty Distributors. To view the list online on this website, click on the links below

Annual Summary of Admiralty Notices to Mariners (NP247)

To supplement Weekly NMs, the UKHO produces an Annual Summary of Notices to Mariners (NP247). This publication contains the Annual Statutory Notices to Mariners Numbers 1-26, a summary of Temporary and Preliminary Notices to Mariners still in force at the start of the year, and a Cumulative Summary of Amendments to Admiralty Sailing Directions.

The paper version of the Annual Summary of Notices to Mariners is published annually in January, and copies are available by subscription from Admiralty Distributors. To access the Annual Summary online, click on the links below

Annual Notices To Mariners 1-26 (PDF Downloads):

Click here for an overview of each of the 26 sections, including how to find sections which have now been moved into 'The Mariners Handbook'.

It's important to keep your charts up to date - rocks may not move but there's a host of other things under and on the sea that do! Our invaluable weekly service gives you the information you need to navigate safely and effectively.

We’ve designed the service to make it easy to update your Admiralty Leisure charts. Follow the link below to find all relevant Notices to Mariners (NMs) released since the publication date of your chart's new edition.

View Admiralty Leisure’s Notices to Mariners

We’ve licensed several companies to issue updates for our products direct to vessels at sea through Admiralty chart distributors. These electronic couriers, or value added resellers, supply correction datasets tailored to a vessel’s portfolio of Admiralty charts and publications. The datasets are derived from the Admiralty digital files on our website.

The electronic courier services help ship owners and masters to manage their chart and publication folios and comply with the International Safety Management Code.

These companies are licensed to deliver Notices to Mariners on our behalf:

• ChartCo (UK) www.chartco.co.uk
• Chart-Track (Belgium) www.charttrack.com
• Datema Folio and Notice Service (DFANS) www.nauticis.com
• DPM (UK) www.dpm.co.uk
• Lilley & Gillie www.lilleyandgillie.co.uk
  
• Marine Press of Canada (Canada) www.marinepress.com
• Maris AS (Norway) www.maris.no
• Novaco Limited www.novaco.co.uk
  
• Thomas Gunn www.thomasgunn.co.uk