Notices to Mariners are issued from a number of different sources, such as the UK Hydrographic Office, Trinity House or Local Harbour Authorities.
Notices to Mariners contain important navigational information such as chart updates, changes in buoyage, prior warning of activities such as dredging, exclusion zones, harbour closures and byelaws etc.
Local Notices to Mariners are often available online and many harbour authorities allow you to subscribe for email updates as and when a new notice is published.
Admiralty Leisure (the leisure division of UKHO) has an web-based Leisure Notices to Mariners service, which has been specifically produced for Admiralty Leisure charts and folios. This details every chart on its own page and gives weekly updates of new information. Chartlets, if required, are available to download.
Imray has a similar corrections service on their website.
The UKHO publishes Navigational Warnings for NAVAREA1 and the UK Coast on its website. Many of these warnings are of a temporary nature, but others may remain in force for several weeks and may be superseded by Notices to Mariners.
Glasson Dock/River Lune Notices to Mariners are available by email from the Lancaster Port Commission.
If you are aware of a source for Notices to Mariners which is not listed below, please email email@example.com
Links to Notices to Mariners can also be found in the RYA SafeTrx app.
RYA SafeTrx is an app for both Android & Apple iOS smartphones that allows you to track your journey (in UK territorial waters) on your phone.
RYA SafeTrx provides all recreational boat users, particularly dinghy cruisers, PWC users, RIB users, canoers, kayakers, wind and kite surfers and smaller boat users with an easily accessible and simple to use means that can inform HM Coastguard of their voyage plans and dynamic location in the event of distress.
This app is freely available to anyone who wants to be safer afloat. It is free to download and there is no charge to use it. Read more about the RYA SafeTrx app.
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