The stuff in the article is not mere conjecture.
Here is one of Tom's Air Injection boards.
You can see the bottom of the air vents in the shadow of the "louver".
He told me he rode it on Maui. Said it was too fast.........

- air inject

- air inject 2
- Tom-Morey-Air-Lubricated-Surfboard.jpg (34.96 KiB) Viewed 3764 times