The bathymetry map (above) of the area (thin green stripe at the NW edge of the peninsula, depicting where the plane first ditched) shows an area just one meter deep immediately (to the viewer's right (plane's left as it faced SSE)).
The report was that the passengers left the area of the plane "after it sank." The frame at lower left shows the passengers still around the plane, but the photo at right (taken about a half hour later from an airborne Grumman Cheetah) shows the plane no further submerged than it had been at left, yet all the passengers had left the area approximately twenty minutes earlier.
The passengers swam (or dog-paddled, bobbed or walked) from the area about twenty-five minutes after ditching. A paid, Maui County official observer reported the plane to have sunk a little more than an hour after ditching. In a recorded interview, one of the passengers said the ocean floor there "was squishy." (Elsewhere in the scenario, there are images of that person (labeled BB) apparently standing on the ocean floor.)
So, what several passengers reported about the time post-ditching at which they left plane area was not true.
I believe the lower frames show two frogmen that were not present on the plane's manifest.
The engine (from this single engine airplane) that the salvor recovered and displayed on his barge was not the same engine that was attached to the plane when it ditched. In a recorded interview, the salvor said, "The wings were separate. The fuselage was separate. The engines were separate."
Fuddy has a person and gear around her (lower right, and mounted onto her left hip (upper right) above) that were not on the plane's manifest.
The Cessna Grand Caravan's engine's manufacturer, Pratt & Whitney Canada, was shipped a second, pre-sabotaged engine (a PT6-141A 675 SHP) that was later dredged up from the ocean floor by the aforementioned salvor. The FAA, NTSB and manufacturer's representatives were all present for the cover-up tear down in which it was confirmed that the engine before them had had a catastrophic failure that the 12/11/2013 ditching engine provably did not manifest.