Very impressive Takata, but your plot assumes that bodies float on the surface. My understanding is that the buoyancy of bodies is highly variable, depending on the quantity of air in the lungs, and the ambient temperature. Often we sink, then, as our bacteria in the digestive tract and elsewhere continue their work, and generate gases, we float. So bodies aren't necessarily a faithful reflection of the surface current either.
--Edit: Flexible Response beat me to it!--