Why must a boat make leeway in order to sail to windward? How can a helmsman prevent downwind rolling? Why is a sail able to produce a force at right angles to the wind direction? How does the motion of water particles in waves affect boat handling? These and many other important questions are addressed by Ross Garrett in his detailed study of the motive forces behind yachting. Part One covers downwind sailing, upwind sailing, sails, the hull, and the dynamic motion of a yacht. Part Two is devoted to detailed mathematical explanations of those phenomena, for readers requiring a more scientific approach. 278 pages. Paperback.