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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.
Careers in the UK Hydrographic Office
UKHO obtains ISO certification
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.
The UKHO's Annual Report and Accounts for 2022 to 2023 is available to view and download
An overview of the UKHO Archive, accessing our archive and ordering copies of archive material.
The systematic survey of the UK’s coastal waters
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.
UKHO Tidal Prediction Service Sample Formats
ADMIRALTY Tide Tables (ATT) format - times and heights of high and low waters, four months per page (A4 portrait)
The UK Hydrographic Office (UKHO) has taken an important step towards a more sustainable future
HMNAO provides information of the sighting of the new crescent moon for the start of Ramadan and the start of Eid al-Fitr
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.
The UK Hydrographic Office (UKHO) is working with the Government of Anguilla (GoA) to provide geospatial data to support safe navigation
Enabling safe and sustainable marine economies across Commonwealth Small Island Developing States (SIDS).
The UK Hydrographic Office (UKHO) has announced the appointment of Rear Admiral Angus Essenhigh OBE as the United Kingdom’s new National Hydrographer.
Record copies of published Admiralty charts produced since 1800 arranged by chart number
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