Dolphin By WILLIAM D. JACKSON. A 16-foot boat specially designed for those who move their craft about by trailer. This trailer boat, the Dolphin, is the answer to low-cost travel over protected waters. The hull is light enough to be transported anywhere by trailer and the boat is of a size to be easily handled. It will accommodate two persons for extended trips or a party of four for day cruises and do it comfortably. Construction and operating costs are low. Plywood is used throughout, and the hull is designed to exact the utmost from low power motors. Any engine of 2 1/2 to 8 horsepower will do. One like the U. S. Falcon 2 1/2 hp. water cooled marine engine will provide very low operating costs with a maximum number of miles per gallon of fuel consumed.