Understanding Yacht Design is for novice designers who want to use pencil and paper or Computer Aided Design. Most of the maths has been replaced by simple rules of thumb. It will be equally useful to boat owners who want to modify the hull, rig, deck layout or accommodation. It will be invaluable to boat buyers who want to answer questions like: How will she sail? How much will she cost? How easy is it to change things? How can I reduce or increase the sail area without upsetting the balance?