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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.
HM Nautical Almanac Office provides the daily rise, set and twilight times in December for the United Kingdom and Ireland
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
Enabling safe and sustainable marine economies across Commonwealth Small Island Developing States (SIDS).
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
Find out more about the UK Hydrographic Office, where we're working to unlock a deeper understanding of the world's oceans.
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 purchase by the public in 1825
Guidance on how to report a security vulnerability on any UK Hydrographic Office service or system, including Admiralty websites or other associated services.
This is a scanned version of a catalogue of charts and nautical publications produced by the Hydrographic Office available for purchase by the public in 1870
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.
This document gives an overview of progress made in the first 2 years of the programme.
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