There is the Marine Debris program at NOAA as well as satellite based tracking methods: https://marinedebris.noaa.gov/discover-marine-debris/garbage-patches ht

There is the Marine Debris program at NOAA as well as satellite based tracking methods: https://marinedebris.noaa.gov/discover-marine-debris/garbage-patches https://marinedebris.noaa.gov/discover-marine-debris/garbage... https://ieeexplore.ieee.org/document/9449485 https://ieeexplore.ieee.org/document/9449485