I'm intentionally avoiding a deep-dive into the subject, so I apologize in advance.
The America's Cup racers were using a form of hydroplane/keel stabilizing foils a decade or so ago.
The hull would rise out of the ocean onto the foils to reduce wetted area, while stabilizing the boat against capsizing. It was very clever.
This new boat, I'm guessing, was designed for a target velocity, at which it would also rise, to reduce friction losses, while maintaining enough hull in the water for directional stability?
