Illegal oil discharge data is based on airborne surveillance supplemented with remote sensing equipment in the Baltic Sea Area carried out by HELCOM Contracting Parties within HELCOM IWGAS group. Years 2016-2021 were extracted from the HELCOM Illegal oil discharges database. Attribute specification and units HELCOM_ID Country Year Spill_ID FlightType Date Time_UTC Wind_speed Wind_direc Latitude Longitude Length_km Width_km Area_km2 Spill_cat EstimVol_m Polluter Category Casefile Remarks

Illegal oil discharges data is based on airborne surveillance supplemented with remote sensing equipment in the Baltic Sea Area carried out by HELCOM Contracting Parties within HELCOM IWGAS group. Aerial surveillance is limited within Russia and Latvia.