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Marine Data Portal

Marine geospatial data from seabed to surface

ADMIRALTY Marine Data Portal

The ADMIRALTY Marine Data Portal provides access to marine data sets held by the UK Hydrographic Office within the UK Exclusive Economic Zone (EEZ). The ADMIRALTY Marine Data Portal replaces the INSPIRE Portal as the place to search and download data sets including:

  • Offshore Infrastructure

  • Vertical Offshore Reference Frame (VORF)

  • Wrecks and Obstructions

  • Seabed Composition

  • HMNAO Astronomical and Calendar Information

  • Bathymetry

  • Ships’ Routeing

  • Contours

  • S-100 trial data sets

The portal has now been updated with a new look and functionality in order to improve the customer experience and enable users to access our services with a single sign-on. As a result of these updates, the URL for the site has changed - which can be accessed below.

Access the ADMIRALTY Marine Data Portal and all available data sets  >

About our data

The UK Hydrographic Office is a world-leading centre for hydrography, providing marine geospatial data to help others to unlock a deeper understanding of the world’s oceans.

Working with a wide range of partners, we source, process and provide access to this data, ranging from seabed to surface. This is key to helping others to make the best use of our oceans in safer, more secure and more sustainable ways.

We make location-based information available through ADMIRALTY Maritime Data Solutions, our world-leading range of charts, publications and custom data sets.

Find out more about the UKHO >

​​NEW - Paid ADMIRALTY Apps and Services

Offshore Infrastructure - An accurate and trustworthy database of over 7,500 surface and subsurface offshore energy installations and infrastructure in UK waters, including oil and gas platforms, wind turbines, well heads, pipelines and respective safety zones.

Vertical Offshore Reference Frame (VORF) - A faster, more accurate, more cost-effective method  to help users convert data between vertical datums for surveys, planning and modelling in UK coastal and offshore zones.

Wrecks and Obstructions - An extensive range of information on over 24,000 wrecks and undefined obstructions in UK waters, from the UK government’s hydrographic and marine geospatial experts.

Seabed Composition - A government-owned database containing almost 50,000 grab samples in UK waters, helping professional marine planners to understand the make-up of the seabed.

HMNAO Astronomical and Calendar Information - The UK government authority on astronomical events like phases of the moon, seasons, equinoxes, and calendar events like religious and bank holidays for publishers of diaries and calendars.


New data sets include offshore infrastructure and VORF


Bathymetry - Bathymetric surveys from various sources including over 4,000 bathymetry surfaces from 1970 to present day. The bathymetry data is updated every three months and a large number have been funded by the Maritime and Coastguard Agency (MCA), an executive agency sponsored by the Department for Transport, under the Civil Hydrography Programme.

Maritime Limits – Download maritime limits and boundaries as data sets or illustrations for the UK EEZ, UK Crown Dependencies and UK Overseas Territories.

Ships’ Routeing - Ships’ Routeing Measures as approved by the International Maritime Organization (IMO), and/or the Maritime and Coastguard Agency (MCA) (as National Competent Authority).

Wrecks – Over 8,000 live and charted wrecks around the UK as maintained by the UKHO's Marine Geospatial Data Management team.

UK Satellite Derived Coastline Data Set - Created using open source satellite data and custom automated computer vision algorithms developed by the UKHO.

S-100 Trial Data Sets - Trial data for S-101 (Electronic Navigational Charts), S-102 (bathymetric surface), S-104 (water level information) and S-111 (surface currents). 

You can access available bathymetry and contour data within the UK EEZ

ADMIRALTY Apps and Services

Contour App - View contours and dredged areas derived from Electronic Navigation Charts within the UK EEZ in a GIS web app.

PEXA Limits App - View authoritative Practice and Exercise Area (PEXA) Limits within the UK EEZ in a GIS web app.

Maritime Limits App - View authoritative Maritime Limits such as Port Limits and Marine Protected Areas within the UK EEZ in a GIS web app. 

Maritime Activity App - View maritime activity such as Aquaculture sites, Ships' Routeing Measures, Spoil Grounds and Marine Protected Areas within the UK EEZ in a GIS web app. 

Tidal Data Services - Discover flexible tidal information services from the UK's largest authoritative network of tidal stations. 

Below we've included some key information about our data sets, including output formats and update frequency. For more information, please log in to our Marine Data Portal.

Access the ADMIRALTY Marine Data Portal >


​Data set
​Output formats

Data set update frequency
​Offshore Infrastructure
​Shape, GeoJSON, CSV
Quarterly​UK EEZ​
​Vertical Offshore Reference Frame (VORF)
.VRF​​Every 10 years
​Wrecks and Obstructions
​Shape, GeoJSON, CSV
Quarterly​​UK EEZ
​Maritime Limits
​Shapefile, CSV, Excel, File Geodatabase, GeoJSON, Feature Collection
As required​​UK EEZ, UK Crown Dependencies and UK Overseas Territories
​Ships' Routeing
​Shapefile, CSV, Excel, File Geodatabase, GeoJSON, Feature Collection
As required​UK EEZ​
Shapefile, CSV, Excel, File Geodatabase, GeoJSON, Feature Collection​Annually​​UK EEZ
​Contour App
​Web App 
​PEXA Limits App
​Web App 

​​To access the portal and download each of our data sets, you will need to create a free login. You can do this by following our simple sign up process.

Sign up for the ADMIRALTY Marine Data Portal>


Data sets, apps and services

Many ADMIRALTY marine data sets, apps and services can be viewed or downloaded for free from the portal. Each set covers the UK Exclusive Economic Zone (EEZ) as standard and has been compiled by marine geospatial experts at the UK Hydrographic Office. These include:

  • Bathymetry

  • Maritime limits

  • Ships’ Routeing

  • Wrecks (standard)

  • PEXA Limits App

  • Offshore Infrastructure App

  • Contour App



Each VORF data set covers approximately 10km2 of the UK EEZ and crown dependencies. Each set is approximately 900m resolution as standard, 100m resolution for rivers and estuaries and meets industry recognised International Hydrographic Organisation Standards.  Each of these VORF areas is available at the following prices (including VAT):

​Number of areas
Price (per area)​
1-5 areas​£216​
6-10 areas​£120
11-60 areas​£96
61+ areas​Price on application​


Wrecks and obstructions data set

Contains additional attributes not found in our standard wrecks data set, including survey details, status and vessel dimensions. Covering the UK EEZ, this single data set is available for £300 (including VAT).

Offshore installation data set

A full set of offshore installation data covering the UK EEZ is available for £300 (including VAT).