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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.
Our flexible service can provide tidal information tailored to your specific requirements.
We have a team of experts who specialise in technical aspects of maritime baselines, limits, zones and boundaries.
ADMIRALTY Tide Tables (ATT) format - times and heights of high and low waters, four months per page (A4 portrait)
The systematic survey of the UK’s coastal waters
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 and low waters
Times and heights of high and low waters as in Format 12, but accompanied by interval heights (any time interval from a minimum of 1 minute to a maximum of 120 minutes)
This is a scanned version of a catalogue of charts and nautical publications produced by the Hydrographic Office available for use by the Royal Navy (not the public) in 1919.
10 minute heights
Times and heights of high and low waters – alternative structure to Format 8
We train students from foreign government hydrographic offices to acquire the core skills, knowledge and competence needed to be a marine cartographer.
Hourly heights
High water-only format, split into morning and afternoon, four months per page (A4 landscape)
Hourly heights, two months per page (A4 portrait)
Times of high water for each day of the year, contained on one page (A4 portrait)
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)
Find out about MCA’s bathymetric data collection programme, how to share data with MCA, and guidance for offshore developers.
UKHO obtains ISO certification
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