The old kauaifishing website no longer worked when I last looked.
Now it is http://napaliseabreezetours.com/
He offers some great fishing and sightseeing from his KHSD 34 powercat. Great mileage and a smooth ride. Yeah displacement hulls!  Told me he once saw Holo Holo slicing through the waves one day when the motion was slamming the malahini silly on the other boats.  Said he wanted a boat like that but smaller.  It doesn’t draw much either.