I always wondered about this. Sailing a boardless boat last year, I hit something that was submerged hard with a rudder and it kicked up. I was probably 2 miles or so offshore with another cat, but I was wondering what might have happened if I had daggerboards. I might have been in trouble. Maybe that is why the F16s have positive floatation?

Are the boats with better constructing like an F18, which has a high minimum weight able to take collision forces and at least make it to shore?

Matt