Pre-engineering 1
Boat Criteria
Pre-engineering 2
Great references
http://www.google.com/search?q=building+a+sailboat&hl=en&rlz=1R2ADFA_enUS394&biw=1662&bih=869&site=webhp&prmd=ivns&tbm=isch&tbo=u&source=univ&sa=X&ei=jaBwTvnLBcrbgQfPqJGNBQ&sqi=2&ved=0CHYQsAQ
http://www.ferrocement.org/