Just to clarify, by "planing" hull I was referring to cats with flat bottom hulls like the Flyer A-cat which tend to jump over waves (also called "slappers" by some) vs "plowing" hulls which tend to more smoothly cut through the waves with rounder or v-shaped bottoms. I think everyone agrees all cats are primarily displacement boats with brief periods of planing caused by dynamic lift. I didn't mean that flat bottomed hull designs truely plane and that others don't and are displacement only. See discussion in prior posts under "Singlehanded Cat Sailing"...
