Jim Macklin wrote
I guess when you're making a movie, violation of the FAA and
USCG laws are OK?

It's pretty obvious to me that the airplane and the boat were never
in the same lake together. Just a large rear-projection screen like
Hollywood used in the past, or a good old blue/green screen effect.

Notice the number of different camera angles used to film the boat
and the men in it.
1. A wide angle shot from some distance off the port side of the boat.
2. A close-up of the man in the bow shot from the stern of the boat
or even outside the boat near the stern.
3. A close-up of the man and the engine shot from the water on the
starboard side of the boat.

How, and to where did all of those other cameras disappear to?

Nope! just a series of video clips assembled in front of a blue screen.

Bob Moore