"Flotsametrics" what we can learn by tracking currents via shoreline debris?

Dr. Curt Ebbesmeyer-retired oceanographer, professional beachcomber Curt has studied oceanographic currents his entire life. In the 1990s Curt founded the Beachcombers Network to connect some types of marine debris that washed up on shore with its sources. Every piece of debris has a human story, some more interesting than others. Curt's book, Flotsametrics and the Floating World describes the entire story and how science has advanced by tracking items like Nike Shoes and Rubber Duckies and their dispersal from container spills at sea.