Detections of litter windrows (LW) in lagoons and other coastal singularities. a, Mar Menor lagoon, Jucar River outlet and Cape Nao (Spain). b, Venice Lagoon and outlets of alpine rivers (Italy). c, Ambracian Gulf and Corfu island (Greece). d, Bardawil Lagoon and ship waiting area of Suez Canal (Egypt). The semi-transparent red dots represent LW detections accumulated during the observation period. Black dots in d correspond to the distribution of waiting ships on 25 March 2021. Zoomed areas are marked with pink rectangles on the lower map.