It won't rise dramatically underway, imo. Smaller boats with tunnels that "kiss" the water at rest, have a better chance of getting some clearance, because they have more planing area per unit of boat weight, are maybe faster anyway, with better power to weight ratio, and even the air lift in the tunnel is greater, because the surface area/weight ratio is better. I have been in planing cats around 35' with diesels that were a bit slow, and I suspect riding on the tunnel to some extent, the ride wasn't too bad though. I'd like to hear from the fisheries research people who actually used it, they'd know. I would keep in mind hydrofoil assist for that boat, though, potentially it could improve both ride and fuel economy.