[ventus45]

This area of the South African coast is subject to a very strong current flowing from east to west.



Notice the two areas of "recirculation".

Is it possible, is it credible, that items swept down the east coast, to the south coast of Africa, could be caught in this "recirculation region" off the continental shelf to the south, and "deposited", then swept out to sea, and then "redeposited", in the same bay, 3 months later ?



Look at the breakwater at Mossel Bay, and the wave action.



And here are the Tide Tables for Mossel Bay for December 2015 and March 2016.






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