The dataset has been developped under the MACHU EU project, involving seven EU MS (BE, DE, NL, PL, PT, UK, SE). The MACHU GIS database provides information about wrecks, sites and objects underwater. MACHU is an applications on Underwater Cultural Heritage providing historic and archaeological information. MACHU is not intended to give exact positions of wrecks an site, in the aim of ensuring their protection.

The dataset on first sales of fish in the EU was created in 2016 by Cogea for the European Marine Observation and Data Network (EMODnet). It originates from the data on monthly first sales of fish made available by the European Market for Fisheries and Aquaculture products (EUMOFA). EUMOFA data have been related to the fish markets locations (points) made available in DG MARE's Master Data Register, revised when necessary according to the United Nations Code for Trade and Transport Locations database (UN/LOCODE) and according to the EUROSTAT/GISCO dataset on main ports locations. Volume (net weight in kg), value (Euro) and price (Euro/kg) data are provided for each fish species in each place of sale by year, month, Commodity Group (CG), Main Commercial Species (MCS), EU's Electronic recording and reporting system (ERS) name, size class, preservation state and presentation state (aggregated by group and disaggregated by presentation type). The geographic coverage of available data is: Belgium, Bulgaria, Cyprus, Denmark, Estonia, France, Greece, Italy, Latvia, Lithuania, Netherlands, Norway, Poland, Portugal, Spain, Sweden and the UK. The dataset is updated twice a year. It covers a time series from 2003 to 2022, where available. The EUMOFA is a fully-fledged observatory, but it is also a work in progress and its coverage is constantly revised by adding or removing locations and species. Compared with the previous version, this new version of the dataset includes an update to September 2022 (for the countries which sent their data to EUMOFA).

The dataset on Ocean Energy Test Sites in the EU was created in 2016 by AZTI for the European Marine Observation and Data Network (EMODnet). It is the result of the aggregation and harmonization of data provided by several sources from all across the EU. It is updated every year, and is available for viewing and download on EMODnet - Human Activities web portal (https://emodnet.ec.europa.eu/en/human-activities). The database contains polygons representing Ocean Energy test sites in the following countries: Denmark, France, Ireland, Netherlands, Norway, Portugal, Spain, Sweden, and the United Kingdom. Where available, each polygon has the following attributes: test site code, name, location, country, sea basin, sea, distance to coast (metres), resource type (wave, tidal), starting year, ending year, lease status, site status, capacity (kW), depth (metres), area (square km), grid connection, number of berths, developer, position info (it indicates if the attribute value is original from the source or has been estimated) and the studies conducted for the Environmental Assessment (EIA). In 2022 the status of the test sites has been been updated.