In 2019, the International Organization for Migration estimated that 1,866 people have died or gone missing while crossing the Mediterranean Sea to reach Europe to escape war or persecution or to pursue a better life. This is an average of five people per day. In recent years, a significant proportion of migrants in distress at sea have been rescued by civil society vessels deployed with a humanitarian mandate to reduce fatalities and bring rescued migrants to safety. Since 2018, however, authorities in some EU Member States started viewing civil society-deployed rescue vessels with hostility. As a reaction, national authorities initiated about 40 administrative and criminal proceedings against crew members or vessels, including seizing the latter. In some cases, rescue vessels were blocked in harbours due to flag issues or the inability to meet technical requirements.