long distances. the 4,000 or so kilometers from the west coast of australia all the way to the eastern coastal regions of africa. this is known as the indian ocean gyre. it rerotates in the counter clockwise fashion. it is small scale and large scale rotation patterns. let s use an analogy here. let s say we drop a plastic bottle in the ocean. what will it do? eventually we will see the plastic bottle float. it will move along the water until it raefs an immovable surface like the beach of reunion island or coast of madagascar for instance and fortunately there are some high end computer models known as a drift analysis that can show exactly where debris will eventually end up as we go forward it a 12-month to 14-month period. this is the adrift.org.au website.