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The home of UK Hydrographic Office on GOV.UK. The UK Hydrographic Office (UKHO) is a world-leading centre for hydrography, specialising in marine geospatial data to support safe, secure and thriving oceans.
UKHO obtains ISO certification
An overview of the UKHO Archive, accessing our archive and ordering copies of archive material.
The UK Hydrographic Office (UKHO) is a world-leading centre for hydrography, specialising in marine geospatial data to support safe, secure and thriving oceans.
Our flexible service can provide tidal information tailored to your specific requirements.
As a Public Authority, the UKHO makes relevant data sets available in compliance with the ‘Infrastructure for Spatial Information in Europe’ (INSPIRE) initiative.
Vanessa Blake, UK Hydrographic Office’s Chief Customer Officer, to succeed outgoing Chief Executive Peter Sparkes
The systematic survey of the UK’s coastal waters
Careers in the UK Hydrographic Office
As a trading fund of the Ministry of Defence (MOD), we produce a global range of charts, publications and digital services for the Royal Navy and other defence customers.
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 UK Centre for Seabed Mapping (UK CSM) programme team co-hosted an event with The Royal Society to explore the vital role of seabed mapping in ocean science.
Former Hydrographer of the Nigerian Navy recognised for services to international hydrography in latest edition of the annual honour.
NavPac 4 is the much anticipated software upgrade to HMNAO’s celestial navigation software package
Timetable for withdrawal of Standard Nautical Charts and Thematic Charts to be extended beyond 2026 in response to user feedback
Record copies of published Admiralty charts produced since 1800 arranged by chart number
The UK Hydrographic Office (UKHO) has taken an important step towards a more sustainable future
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
The UKHO's Annual Report and Accounts for 2022 to 2023 is available to view and download
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