One of the Hunters Child boats had a row of vent tubes in front of the mast that pulled air down and released it along the hull. I heard it was noisy as hell at speed.Anyone know anything about supercavitation? Bubbles along the hull to reduce drag? That’s legal as far as I can see for this sub race. We have dive tanks with plenty of capacity for the bubbles and could set up a series of small tubes all over the hull to envelop the thing in a bubble cocoon. Any chance of that working to decrease drag?