Your final design waterline will be dependant on the design displacement. Does Hulldesign do displacement calculations?

: Thanks to all who commented on the use of luaun plywood. In addition to
: construction methods I am also trying to design my own kayak using the
: Hulldesign program. Can anyone advise on guidelines for a target design
: water line? My research indicates that 3-4 inches appears to be a
: reasonable target. I am trying for a length of about 15-16 feet with a
: beam of 24 inches for a design load of 250 lbs (boat, paddler & gear
: total).

: Thanks Glen