Abstract: A stationary screw induction system for improving performance of a watercraft has a cylindrical housing with a first closed end and a second open end. A housing inlet opening is disposed within the housing between the first and second ends. Disposed within the inside of the cylindrical housing is an induction screw which is a helical shaped surface radially disposed about a spine which is coincident with the central axis of the cylindrical housing and forms the central section of the induction screw. The helical shaped surface has a leading edge in contact with the spine and an outside edge in contact with the inner surface of the housing. An induction channel acts to conduct fluid from the surrounding environment into the stationary screw induction system. The induction channel has an induction inlet which acts in fluid communication with the housing inlet opening.

Abstract: Paired spaced electrically driven motors provide a steerable propelling system for small boats. Each motor drives a propeller carried in an elongate channel, communicating from each lateral side of a boat beneath the water line to one boat end, to move water through such channels for boat propulsion. The electrical motors are of variable speed, reversible, and separately controlled by a joystick type control device to provide differential control of motor speed to allow steerage. The propelling system provides a low speed, maneuverable propulsion system for fishing use, as an auxiliary power system for boats having a separate principal powering system, and to aid maneuverability alone or in conjunction with the principal powering system.