A swimming lane wave suppressor, for use in suppressing waves and for use in the demarcation of swimming pool lanes, comprised of two cylindrical cores having a plurality of fins radially extending from their outer surface, the inner surface of the first core having a larger diameter than the inner surface of the second core. The fins are positioned substantially coextensively in a lane of each core. At least one spacer is circumferentially positioned between and connected to the core members and fins. A flotation assembly is axially positioned within the first core member having the larger inside diameter and compression fit against the inner surface thereof. The flotation assembly includes a hollow, water tight cylindrical body having a central axial opening for receiving a cable or like device for stringing a plurality of wave suppressors together to form a lane demarcation.

A system for protecting a coast from erosion by wave action of a body of water comprises one or more rows of fluid dynamic repellers anchored in the water near the shore line. Each of the fluid dynamic repellers comprises a top-shaped bouyant body tethered to an anchor on the bottom and having a plurality of laterally projecting arms. A paddle-like blade on each of the arms is inclined to the horizontal so as to deflect subsurface wave motion, thereby creating turbulence which dissipates wave action that would cause erosion of the coast.

A device (15, 18) for use in a body of water (10) as one of a plurality of such devices assembled in axial alignment with one another along a restraining element (16) to suppress incident wave turbulence, the devices having a hub (19, 119) adapted to receive the restraining element, a plurality of planar vanes (23, 123) for directing incident water extending generally radially and axially of the hub, an annular baffle (21, 121) disposed proximate the radial extremity of the vanes, a web (20, 120) for suppressing turbulence extending radially of the hub and oriented substantially perpendicular to the vanes, and elements (30, 130) on the hub precluding relative rotation between adjacent of such devices assembled along the restraining element.

A wave suppression device, for use suppressing waves and for use in the demarcation of swimming pool lanes, comprised of a cylindrical core having a plurality of fins radially extending from its outer surface. The fins are positioned substantially coextensively along the length of the core. At least one spacer is circumferentially positioned about and connected to the core member and fins. A flotation assembly is axially positioned within the core member and compression fit against the inner surface thereof. The flotation assembly includes a central axial opening for receiving a cable or like device for stringing a plurality of wave suppression devices together to form a lane demarcation.

A portable self-setting marker buoy (10) comprises an elongate float body (12) having a pair of spherical end portions (14) secured to opposite ends of a tubular intermediate portion (16), to which one end of a line (20) is attached. A sinker (24) is attached to the other end of the line (20). Laterally projecting paddles (18) stabilize the body (12) to minimize drifting of the buoy after it has been thrown into the water and the line (20) unwinds as the sinker (24) hits bottom. An internal battery operated light source (26) is preferably included for illuminating the buoy during periods of low visibility or darkness.