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04/08/2007: "THE NORTHERN SHALLOWS....... of the Great Barrier Reefs"

As seen through polarizing sunglasses - the dark blue line is where the sandy bottom drops into deeper water.

A crystal ocean here with 120 foot horizontal visibility - warm and pollution free. Beautiful.

On the eastern or 'weather side' of the reef, visibility is mostly to about 200 foot. The Coral Sea touching the Great Barrier Reef(s).