Patent ID: 7455561

Claim:
A sinkable buoy system, comprising: a heat-sealed urethane coated nylon air bladder including a valve positioned about a bottom end of the air bladder; a buoy removably connected to the air bladder by a tether having an adjustable length, wherein the buoy floats above the air bladder in the water; a weight removably connected to the air bladder by a tether having an adjustable length, wherein the weight is positioned below the air bladder in the water; an air supply coupled to the air bladder through an air supply line and operable for selectively supplying and removing a volume of air to and from the air bladder; a mounting plate for mounting the buoy system to a cross-arm of a water sports course, the mounting plate defining attachment points for attaching at least one cross-arm position maintaining cable for connecting the cross-arm to a main cable of the water sports course, the mounting plate positioned between the air bladder and the weight; wherein the buoy system is operable for floating and submerging the buoy to a predetermined depth and in a controlled manner.