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The UK Hydrographic Office (UKHO) is a world-leading centre for hydrography, delivering data and expertise to support safe, secure and thriving oceans.
The systematic survey of the UK’s coastal waters
ADMIRALTY Tide Tables (ATT) format - times and heights of high and low waters, four months per page (A4 portrait)
The UKHO's Annual Report and Accounts for 2023 to 2024 is available to view and download
As a world-leading centre for hydrography, we support other nations with their hydrographic understanding and capabilities to support safety of life at sea.
First published during the 2022 to 2024 Sunak Conservative government
We have a team of experts who specialise in technical aspects of maritime baselines, limits, zones and boundaries.
The Harbour Masters’ Guide to Hydrographic and Maritime Information Exchange is a joint publication from the UKHO and the UK Harbour Masters’ Association.
The Seabed Mapping App is now available on the ADMIRALTY Marine Data Portal
First published during the 2019 to 2022 Johnson Conservative government
How to supply goods and services to the UK Hydrographic Office.
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