Water ski construction

Claim 1

A water ski construction, comprising: (a) an elongated element having an upper and lower surface, said lower surface divided, in the longitudinal direction, into a fore zone, a mid-zone, and an aft-zone, the lower surface thereof adapted to contact water, (b) said fore zone defining a single concave surface in the nature of an arrow-like depression, the point of the arrow of said depression directed along the major axis of said ski and in the direction of intended travel thereof, (c) said mid-zone defining first and second concave longitudinal channels separated by a sharp edge of arcuate intersection between said first and second channels, said channels and said edge extending throughout said mid-zone and into said aft-zone, said mid-zone further including a surface which defines and frames the outer periphery of both said fore- and mid-zones of said elongated element and, thereby, the outer transverse extent of said longitudinal channels, said transverse extent defining the minor axis of the ski, (d) said aft-zone including said pair of concave channels, absent said mid-zone surfaces, (e) the aft-zone tapered transversely inward to reduce, at its end, to zero the transverse width of the ski, and (f) the radial depth of said longitudinal channels progressively deepening at the mid-zone and lessening at said aft-zone as well as at the single concave surface of said fore-zone, whereby the above-defined contour of the lower surface operates to afford enhanced control and maneuverability of the ski.