“Yes, “bobbing” as reported by Clyde Kawasaki, the pilot, and “doing fine” as reported by Phillip Hollstein, a passenger.”
Except Kawasaki and Hollstein were the ones who swam to shore shortly after exiting the plane, so they weren’t actually there to witness anything about her condition besides how she appeared immediately after she exited the plane. The only person who was with her after that was Yamamoto, and he tells us she was clearly in distress.
“Her brother, Lewis P. Fuddy Jr, said his sister was healthy with no heart problems.”
Is Lewis Fuddy a doctor? Otherwise, his medical opinion doesn’t count for much. Sorry, but anyone can take one look at Fuddy and see she was overweight, and anyone at her age who is overweight and out of shape is going to have issues. Besides, even people without known heart issues can die of heart problems, so even if her brother were right, it doesn’t mean much.
“The nuasances you share are from the autopsy reports which do not agree as to whether she died from hyperventilation (ridiculous), or drowning, or internal injuries.”
No, the autopsy said she died of arrhythmia brought on by stress and hyperventilation.
“You should be aware too, that overweight people are naturally more buoyant, not less buoyant, than those with more normal weight, especially in salt water.”
Buoyancy doesn’t matter for much when you are not a good swimmer, you are fully clothed in the ocean, and you are panicking.
“I searched and could find no record of any surviving passenger mentioning strenuous exertion in the water.”
Obviously you didn’t do a basic search to read the account of the only eyewitness to her death then.
“Not buying what you are selling. Not at all.”
By all means, go believe the super ninja frogman assassin theory. Or maybe it was mermen, or the kraken!