UKHO Admiralty Notices to Mariners (weekly)
UKHO Admiralty Notices to Mariners (weekly)
The UK Hydrographic Office publishes Admiralty Notices to Mariners (weekly, daily, cumulative and annual) as downloadable PDFs on the Maritime Safety Information site, covering chart corrections and related navigational warnings for Admiralty products.
Coverage
Weekly NTM PDF packs and related daily/cumulative/annual files listed on the MSI Notices to Mariners page. Exact notice counts vary by week; Not stated as a fixed archive size on the checked page.
Verdict
This is the UK's official Admiralty Notices to Mariners feed for agents tracking chart corrections and navigational warnings that affect ships using Admiralty charts — complementary to the already-listed Canadian NOTMAR and USCG NAVCEN MSI pages. The MSI site lists public PDF downloads without a login; the footer reads "© Crown copyright 2026 UK Hydrographic Office" and no separate open-data licence was stated on the checked page. Signal Lab links to the official MSI downloads only and does not redistribute the PDFs.
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