Ok Richie you got my attention-- the outline in the beach sand, it that a depression, or the outline of where 'something' was? There does appear to be something showing some reflection, but it hard for me to make out. But----from what I remember, it seems like around the place that Emily (?) stated finding plane parts on the beach?
I know that Ric & Co have searched the area, and probably nothing there now---but if there was one piece that was previously overlooked because it was hidden, and now uncovered due to storms, high surf, etc, it might shed some light on a few things.
Wondering outloud----'might' there be a possibliity of a one day shore excursion while the multibeam survery is going on? At the same time, possibly look for the 'wheel" in the lagoon passage, even though all are extreme longshots. Just a thought-