About the ADMIRALTY Marine Data Portal
The ADMIRALTY Marine Data Portal is a single access point for a range of marine geospatial data, apps and APIs within the UK's Exclusive Economic Zone.
Unlocking access to a wealth of data
The data we hold is gathered from a range of expert providers by working closely with government organisations, hydrographic offices and other partners across the world. This data has the potential to be used for a wide range of applications - from supporting safe navigation to wider decision making across the blue economy.
Seabed mapping services
We are globally recognised experts in seabed mapping and have extensive holdings and services, including over 4,000 bathymetry surfaces from 1970 to present day, to help you get the right seabed mapping solution to support your marine decision making.
Marine data sets
We hold a wealth of marine geospatial data from the seabed to surface, offshore and beyond. Through the ADMIRALTY Marine Data Portal, users can access extensive data on bathymetry, wrecks and obstructions, ships' routeing, astronomical and calendar information, maritime limits and offshore infrastructure.
Discover our suite of APIs where you can develop your solution using a wide range of marine data from around the UK. Raster Web Map Services provide information on fishing limits, marine protected areas, port limits, territorial and continental shelf limits and more, to enable you to start building your software solution.
Discover flexible tidal information services to meet your needs. Choose from over 500 primary and secondary tidal stations around the UK with the ADMIRALTY Tidal Prediction Service and access tidal predictions for the UK coastline with our UK Tidal API.
Purchase astronomical and calendar information from Her Majesty's Nautical Almanac Office (HMNAO), a team of scientists and mathematicians within the UKHO who specialise in astronomy and celestial navigation.