To get your mind around just how much marine rubbish washes up on our shores, consider this: A Marine Debris Survey at Cape Arnhem in northern Australia counted, identified and collected all the rubbish washed up on a 5 mile stretch of beach in 10 days.

CNN: The stark reality of a throw-away society

To do that, the ocean-trotter hitched a ride on a current within the Gulf of Carpentaria (that separates Cape York from Arnhem Land, to the west).

BBC: Crocodiles 'surf' long distance on ocean currents