Confusion!
This is a very strange set of circumstances. The aircraft was seen to be flying straight and level at about 200' when it slowly rolled and went into the sea. It appears that the impact with the sea was near vertical. Prop blades were all sheared off equally on impact with the ocean which seems to negate speculation that a prop failure of sorts was the cause. The aircraft absolutely disintegrated upon impact, confirmatuion of high speed impact. There was a suggestion of a failure and an attempted ditching. Given Greg's general conservatism, the questions continue!