Designing a boat from a half-hull model is covered in full in this episode of the Art of Boat Building. Boat Builder, Bob Emser, discusses Nathanael Herreshoff's old master way of designing a boat straight from a wooden model. He shows us Capt. Nat Herreshoff "Offset Measuring Instrument" and his modern replica of one. Made from off the self materials Bob demonstrates how the offset device is use to take off the body plan measurement. Bob and Steve Denette have discussion on the layout of the new tender Victoria. We also go on a field trip to the Wooden Boat School where Paul Gartside, Naval Architect, teaches about spline weights. We then see the production and casting of the lead spline weights (Ducks) by a fellow design class mate, Matt Moeller. All is finished up with the line drawing being completed.