This dataset contains integrated eutrophication status assessment 2011-2016, visualized for indirect effects (C3_ER). The assessment is done on HELCOM Assessment Unit level 4: HELCOM Subbasins with coastal WFD water type or water bodies. The HEAT 3.0 has been applied for open sea assessment units using HELCOM core indicators and for coastal areas using national WFD indicators. For more information about the methodology, see State of the Baltic Sea report and HELCOM Eutrophication assessment manual. Attribute information: "HELCOM_ID": ID of HELCOM Level 4 Assessment unit "Country": Country / opensea "level_2": Name of HELCOM Level 2 Assessment unit "Name": Name of HELCOM Level 4 Assessment unit "Area_km2" : Area of assessment unit "C1_N": Criteria 1, number of indicators used for calculating Eutrophication Ratio (ER) "C1_ER": Criteria 1, ER "C1_SCORE": Criteria 1, Confidence of ER "C2_N": Criteria 2, number of indicators used for calculating ER "C2_ER": Criteria 2, ER "C2_SCORE": Criteria 2, Confidence of ER "C3_N": Criteria 3, number of indicators used for calculating ER "C3_ER": Criteria 3, ER "C3_SCORE": Criteria 3, Confidence of ER "N": Number of criteria used for calculating overall ER "ER": Overall ER "SCORE": Status confidence "STATUS": Status classification (Good (classes 0-0.5 & 0.5-1.0), Not Good (classes 1.0-1.5, 1.5-2.0 & >2.0), Not assessed) "CONFIDENCE": Final confidence rating (< 50% = low, 50-74 % = Moderate, = 75 % = High) "AULEVEL": Level of assessment units

Pressure layer combines all human activities that cause changes to hydrological conditions. The human activities were presented as point data which were given spatial extents (given below). The pressure value was given as the proportion of the grid cell under the pressure. The following human activities were combined into the changes to hydrological conditions layer; - Hydropower dams (a 1km2 grid cell in the river estuary was selected) - Water course modification (1 km) - Wind turbines (operational, 0.3 km, linear decline) - Oil platforms (0.5 km, linear decline) The human activity datasets were first processed separately covering the whole Baltic Sea and then summed together and overlapping areas were dissolved to remove double counting. Attenuation gradients are assigned to each layer as described above. Area effected decreases when distance from avtivity increases. Layer was normalized.

This data set on deposition sites of dredged material (points) reported by HELCOM Contracting parties according to http://www.helcom.fi/Recommendations/Rec%2036-2.pdf for the reporting period 2011-2016. The dataset contains data reported by nationally by nominated experts by HELCOM PRESSURE group for Denmark, Germany, Estonia, Finland, Latvia, Lithuania, Poland, Russia and Sweden.

This dataset contains dredging sites reported by HELCOM Contracting Parties, according to the HELCOM Recommendation 36/2 (https://helcom.fi/action-areas/industrial-municipal-releases/dredging/). Reporting of dredging sites connected to disposal events became mandatory starting from 2023 data, when the HELCOM Guidelines for Management of Dredged Material at Sea was updated. Before this, reporting of dredging sites was not mandatory, but several Contracting Parties report information about dredging activities. The dredging sites are grouped by spatial data type to point, line and polygon datasets. The dredging site includes a link to corresponding site where the material has been deposited. Attribute information (heading for downloadable shapefile): Dredging ID (Dredging_I): Dredging site id, where material originates from Deposit site (Helcom site ID) (Helcom_sit): Unique id for deposit site Deposit site link (Deposit_si): Link to deposit site, where material from this dredging site is deposited Site name (Site_name): Name of the dredging site Type of area dredged (Type_of_ar): Type of area that was dredged (e.g. harbour or sea) Dredging activity (Dredging_a): Maintenance or capital dredging Material dredged (Material_d): The type of material dredged (e.g. sand, silt) Year (Year): Year of activity Country (Country): Contracting Party of HELCOM Sub-basin (Sub_basin): HELCOM sub-basin (assessment unit level 2) where activity has taken place Quality flag (Quality_fl): Quality flag of data - Quality assured: Data is quality assured either in the annual verification or in a separate quality assurance process by EN DREDS - No quality assurance: Data is not quality assured due to the reason that process has not been carried out - No Quality assurance possible: Data quality assurance process has been made, but it was not possible to find the reference data to verify the parameters

This dataset contains dredging sites reported by HELCOM Contracting Parties, according to the HELCOM Recommendation 36/2 (https://helcom.fi/action-areas/industrial-municipal-releases/dredging/). Reporting of dredging sites connected to disposal events became mandatory starting from 2023 data, when the HELCOM Guidelines for Management of Dredged Material at Sea was updated. Before this, reporting of dredging sites was not mandatory, but several Contracting Parties report information about dredging activities. The dredging sites are grouped by spatial data type to point, line and polygon datasets. The dredging site includes a link to corresponding site where the material has been deposited. Attribute information (heading for downloadable shapefile): Dredging ID (Dredging_I): Dredging site id, where material originates from Deposit site (Helcom site ID) (Helcom_sit): Unique id for deposit site Deposit site link (Deposit_si): Link to deposit site, where material from this dredging site is deposited Site name (Site_name): Name of the dredging site Type of area dredged (Type_of_ar): Type of area that was dredged (e.g. harbour or sea) Dredging activity (Dredging_a): Maintenance or capital dredging Material dredged (Material_d): The type of material dredged (e.g. sand, silt) Year (Year): Year of activity Country (Country): Contracting Party of HELCOM Sub-basin (Sub_basin): HELCOM sub-basin (assessment unit level 2) where activity has taken place Quality flag (Quality_fl): Quality flag of data - Quality assured: Data is quality assured either in the annual verification or in a separate quality assurance process by EN DREDS - No quality assurance: Data is not quality assured due to the reason that process has not been carried out - No Quality assurance possible: Data quality assurance process has been made, but it was not possible to find the reference data to verify the parameters

Observations of Fucus serratus were collected from the Baltic Sea area for HELCOM Red List species list. The HELCOM Red List of Baltic Sea species in danger of becoming extinct (2013) is the first threat assessment for Baltic Sea species that covers all marine mammals, fish, birds, macrophytes (aquatic plants), and benthic invertebrates, and follows the Red List criteria of the International Union for Conservation of Nature (IUCN). Almost 2800 species were considered in the Red List assessment and about 1750 were evaluated according to the IUCN Red List criteria. Fucus serratus has been placed to the Red List category of Least Concern (LC) species. Dataset for download contains spatial grid of the Baltic Sea. Distribution of the species can be found in corresponding name column. Values are coded: 0 = no observations 1 = present before year 1995 or in 1995 2 = present after year 1995 3 = present before and after year 1995

This dataset describes fishing intensity for SSC DMF mobile bottom contacting gear in 2011 based on VMS/Log book data processed by ICES Working Group on Spatial Fisheries Data (WGSFD). ICES secretariat collected during 2017 relevant VMS and logbook data for 2009-2016 to produce, as a technical service to HELCOM, updated spatial data layers on fishing intensity/pressure. Improved data quality control checks were implemented. Submitted data across the HELCOM area have improved in quality compared to previous data 2009-2013 published in 2015. Standardized methods were used to produce the requested data layers. The code used to create the data products is available here: https://github.com/ices-eg/wg_WGSFD For further technical information on the advice request, see http://www.ices.dk/sites/pub/Publication%20Reports/Advice/2017/Special_requests/helcom.2017.18.pdf HELCOM secretariat did the following processing to the shapefile provided by ICES: - Conversion to ETRS89LAEA coordinate system - Added feature and attribute "Reported" to display unreported areas. Dataset attribute information: c-square: Unique reference of the c-square polygon Year: Year of fishing activity mid_lat: latitude coordinate of the centroid of c-square inWGS84 decimal degrees mid_lon: longitude coordinate of the centroid of c-square inWGS84 decimal degrees SurfaceSAR: Surface area ratio (Swept area, < 2 cm penetration depth of the gear components) Subsurface: Subsurface area ratio (Swept area, subsurface =>2 cm penetration depth of the gear components) totweight: Total Weight (kg) totvalue: Total value (Euros) Kw Fishing Hours: (Kw*h) Fishing hours: (h) Reported: Yes=Reported data. No= No reported data (area that does not contain effort/intensity value due to lack of reported data). Please note that this dataset was updated (v2) in January 2019, see further details below in the lineage section.

Input data for the Navigation Safety Analytical Module on ReMAP project, created in 2024 and compiled from different data sources is provided. Below is further information on datasets applied for the module and original metadata. More information about the module and the project can be found at http://www.geoportal.ulpgc.es/remap/ The following datasets were directly collected from MADS and no modifications were applied: - Impulsive noise data points (https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/088099de-f6b8-4a2f-aca0-bbe178318268) - Impulsive noise data polygons (https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/088099de-f6b8-4a2f-aca0-bbe178318268) - Harbour porpoise importance map HOLAS 3 (https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/cb250787-ae97-4452-9caa-eba9abe0ec4e) - Grey seal distribution HOLAS 3 (https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/37ab54cc-1084-4bcd-a76d-2c2738491081) - Harbour seal distribution HOLAS 3 (https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/37ab54cc-1084-4bcd-a76d-2c2738491081) - Ringed seal distribution HOLAS 3 (https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/37ab54cc-1084-4bcd-a76d-2c2738491081) - Hazardous wrecks in the Baltic Sea (https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/f3cfc0d8-d28b-4c5d-b9eb-f456d294e720) - Baltic Sea EBSAs (https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/828468c6-dd88-408c-97d3-ce9c926681f0) The following datasets were directly collected from EMODnet and no modifications were applied: - MSP standardized data in with EMODnet data model (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/5d89d371-a52a-476b-92de-a423f6d2c15d) - EMODnet lighthouse (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/94d616f7-340d-4a67-a07c-dc54ec215cc3) - EMODnet MPA (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/8ee2d464-c628-4e4c-8308-be48a2da121e) - Vessel density EMODnet (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/0f2f3ff1-30ef-49e1-96e7-8ca78d58a07c) - Military area(https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/579e4a3b-95e4-48c6-8352-914ebae0ae1d) - EMODnet bathymetry (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/4f7ab468-f4b9-4c2c-8d3b-49a375cf9964) - EMODnet mean sea level (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/36821cff-56db-4e96-8426-ddfe68240c4b) - EMODnet aggregate extraction (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/fde45abd-7bf3-4f05-869c-d1ce77f4ac63) - EMODnet dredging (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/d3e86612-35a7-4c0f-a995-245062fd2792) - EMODnet wind farm (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/8201070b-4b0b-4d54-8910-abcea5dce57f) - EMODnet aquaculture (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/03c35b79-808f-4168-9d30-2de44a55a6f4 ; https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/55886bab-2932-4d6d-bfe3-06626b0172ab) - EMODnet main ports (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/379d0425-8924-4a41-a088-1a002d2ea748) - EMODnet offshore installations (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/ddbe3597-4e3f-4e74-8d31-947c4efef2e9) - EMODnet pipeline (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/aca3dd01-77ac-47fe-8291-6ca916daaa6d) - EMODnet dumped munition (https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/661aa259-8ea9-49ae-a39d-49685057b013) The following datasets were harmonized according to the module data model: - cables (original dataset on https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/9026b43c-7da8-4a8f-8854-4a4dba50fb12)

Input data for the Cumulative Effects Assessment Analytical Module on ReMAP project, created in 2024 and compiled from different data sources is provided. Below is further information on datasets applied for the module and original metadata. More information about the module and the project can be found at http://www.geoportal.ulpgc.es/remap/ The Cumulative Effects Assessment Module primarily aims to evaluate the cumulative burden that multiple and simultaneous activities may impose on the marine environment. The analysis utilizes the SPIA tool, applied in HOLAS3 (https://helcom.fi/wp-content/uploads/2023/03/HELCOM-Thematic-assessment-of-spatial-distribution-of-pressures-and-impacts-2016-2021.pdf). MSP data used in the analysis for the Baltic Sea can be found at: https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/7e216ec3-25d4-4a4e-89ec-62aceb16eed0 Data used for the ecosystem components at the Baltic Sea can be found at: - Herring and Sprat abundance: https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/27cb947f-7b2a-4baa-8eea-e270765e9039 - Cod abundance: https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/82c117ab-1a47-4d1e-99cf-5340339fa222 - Bottom habitats not influenced by permanent anoxia: https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/5490da33-8df5-4280-a980-e939a589dc8b - Natura habitats: https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/cc77dbd9-b4bc-43bf-accf-39fe603c1fda - Seals distribution: https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/37ab54cc-1084-4bcd-a76d-2c2738491081 - Wintering and breeding area for birds: https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/056d0fe1-d196-4753-834d-3ccbd0c4de51 - Harbour porpoise importance map: https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/cb250787-ae97-4452-9caa-eba9abe0ec4e - Benthic species: https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/0e879921-850a-4fd4-894f-90ce568a2b66 - Broadscale habitats: https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/f0770ea9-8110-4145-b85f-afee46d5df85

Location of water course modifications (trenching, culverting, canalisation). The data was made available by HELCOM Contracting Parties in response to data request. The data was received from Estonia, Finland and Poland. Data reported by Finland and Poland as water course modification were interpreted as pipelines and were included in HELCOM HOLAS 2 Pipelines dataset. The activity was declared as not relevant in Germany and Lithuania. From Latvia, Russia and Sweden no data was reported.