This is a reference book for all power, sail, working and pleasure boats to serve as a practical aid for the average mechanic, engineer, boatbuilder, yachtsman or naval achitect. The author discusses propeller selection, installation and speed and offers charts and graphs that will enable the user to analyse the speed and powering characteristics of a boat with relation to its propeller requirements. David Geer is a naval architect specialising in the design of yachts and commercial craft to 180 feet. He has worked on a wide range of vessels and is now the owner of his own design firm.