I have to say that I think the Spec Sheet may be in error. I looked at the videos on Candelas website, and it looks to me like there's significantly more than 5 cm between the water surface and the bottom of the hull.
Mikael at Candela here. It's supposed to be "wake", not "wave" - sorry for this. The wake behind the boat is only 5cm, so no wake damage here:) The boat handles waves nicely, we can fly in up to 1,2 meter high waves - watch this:
https://www.youtube.com/watch?v=m7I0pVpnytM