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Emergency Alerts Test on Sunday 7 September, 3pm
Our flexible service can provide tidal information tailored to your specific requirements.
An overview of the UKHO Archive, accessing our archive and ordering copies of archive material.
As a Public Authority, the UKHO makes relevant data sets available in compliance with the ‘Infrastructure for Spatial Information in Europe’ (INSPIRE) initiative.
We have a team of experts who specialise in technical aspects of maritime baselines, limits, zones and boundaries.
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)
Find out about MCA’s bathymetric data collection programme, how to share data with MCA, and guidance for offshore developers.
How to propose a new survey, what data the UKHO requires for a nautical chart, and how to report safety critical information or errors in our products
Times and heights of high water only, split into morning and afternoon, one month per page, with a table drawn around the data (A4 portrait)
High water-only format, split into morning and afternoon, four months per page (A4 landscape)
Times and heights of high and low waters, split into morning and afternoon, one month per page, with a table drawn around the data (A4 portrait)
We train students from foreign government hydrographic offices to acquire the core skills, knowledge and competence needed to be a marine cartographer.
Hourly heights
Times of high water for each day of the year, contained on one page (A4 portrait)
The UKHO Archive Information Asset Register (IAR) contributes to the government-wide IAR, available through the Office of Public Sector Information.
UKHO obtains ISO certification
Times and heights of high and low waters, split into morning and afternoon, one month per page, without a table drawn around the data (A4 portrait)
Hourly heights, two months per page (A4 portrait)
Times and heights of high and low waters
Times and heights of high waters only
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