Abstract: A flow-diverter apparatus includes two hull and foil assemblies pivotally connected by rigid members and attached to control lines. Several flow-diverter apparatus may be joined by lines, cables or rigid links to form a flow-diverter system. The apparatus may also include lines/cables to vertically distribute control line force. Attachment points or lines for booms, scientific equipment, dispersion equipment, fire suppression equipment or other devices may also be provided. Apparatus may use horizontal hydrodynamic lift forces to create a diversion flow transverse to an onset flow, to deploy and hold equipment transverse to an onset flow, and/or to provide mixing on the surface of a body of water. Apparatus may be deployed from shore, from a fixed point in the water, or by a vessel.

Abstract: A hull of a boat, which is particularly intended for use with a jet pump propulsion system, is provided with two channels formed in the port and starboard surfaces of the hull and displaced from a keel line. Each channel comprises a forward edge that intersects the hull at an angle to define a continuous surface with a portion of the hull that is immediately forward of the channel. The channel intersects the transom of the boat at a rearward edge. Each channel has a pair of sidewalls which are contiguous with their associated generally planar surface of the channel. The sidewalls are generally parallel to a central vertical plane which extends from a bow of the boat to a transom of the boat and in which the keel line is disposed. Each pair of sidewalls are generally parallel to each other.

Abstract: A flow-diverter apparatus includes two hull and foil assemblies pivotally connected by rigid members and attached to control lines. Several flow-diverter apparatus may be joined by lines, cables or rigid links to form a flow-diverter system. The apparatus may also include lines/cables to vertically distribute control line force. Attachment points or lines for booms, scientific equipment, dispersion equipment, fire suppression equipment or other devices may also be provided. Apparatus may use horizontal hydrodynamic lift forces to create a diversion flow transverse to an onset flow, to deploy and hold equipment transverse to an onset flow, and/or to provide mixing on the surface of a body of water. Apparatus may be deployed from shore, from a fixed point in the water, or by a vessel.

Abstract: A Vee bottom planing boat hull (32) has right and left steps (44 and 46) positioned so as to optimize the boat's trim angle at top speed, and defining right and left notches (48 and 50) in which are pivotally mounted left and right trim tabs (56 and 58) having forward leading edges (60 and 62) along oblique pivot axes (64 and 66) causing outer corners (102 and 104) of trailing edges (68 and 70) of the trim tabs to move downwardly more than inner corners (106 and 108) during downward pivoting of the trim tabs, providing an active hull to control boat trim angle and effectively reduce deadrise angle while maintaining a running surface trailing edge substantially free of discontinuities in the vertical direction.