What is Admiralty List Of Notices To Mariners?

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 directl y from the UKHO.
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 List Of Notices To Mariners are published into 3 sections:
  1. Weekly Notices To Mariners(WNTM)
  2. Cumulative List of Admiralty Notices to Mariners (NP234)
  3. Annual Summary Of Admiralty Notices To Mariners