The COVID-19 pandemic has highlighted the professionalism and sacrifice of the two million seafarers who serve on the world's merchant fleet. Shipping has continued to transport more than 80% of world trade, including vital medical supplies, food and other basic goods that are critical for the COVID-19 response and recovery – but hundreds of thousands of seafarers face a humanitarian crisis as they have been stranded at sea, unable to get off the ships they operate with contracts extended by many months. This needs to be addressed urgently, through Governments designating seafarers as essential workers and ensuring safe crew changes can take place.