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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.
Our flexible service can provide tidal information tailored to your specific requirements.
The UK Hydrographic Office (UKHO) is a world-leading centre for hydrography, specialising in marine geospatial data to support safe, secure and thriving oceans.
We have a team of experts who specialise in technical aspects of maritime baselines, limits, zones and boundaries.
As a Public Authority, the UKHO makes relevant data sets available in compliance with the ‘Infrastructure for Spatial Information in Europe’ (INSPIRE) initiative.
Careers in the UK Hydrographic Office
The systematic survey of the UK’s coastal waters
NavPac 4 is the much anticipated software upgrade to HMNAO’s celestial navigation software package
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.
Timetable for withdrawal of Standard Nautical Charts and Thematic Charts to be extended beyond 2026 in response to user feedback
Vanessa Blake, UK Hydrographic Office’s Chief Customer Officer, to succeed outgoing Chief Executive Peter Sparkes
Former Hydrographer of the Nigerian Navy recognised for services to international hydrography in latest edition of the annual honour.
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.
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
ADMIRALTY Tide Tables (ATT) format - times and heights of high and low waters, four months per page (A4 portrait)
This roadmap sets out our sustainability journey and our ambition over the coming years to address the sustainability challenges facing our industry
The UKHO's Annual Report and Accounts for 2022 to 2023 is available to view and download
Information about the UKHO and its activities of interest to Regional Hydrographic Commissions.
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