Insta-Slalom invented the use of internal flotation in the PVC booms. This allows the booms to float level underwater, which prevents sagging, to insure accuracy. Without the internal flotation, the PVC pipe would sag in the middle causing the course to be narrow. It would also cause the boat path buoys to float uneven on the surface. The placement of the flotation inside of the booms allows the water to drain in and out of the pipe, preventing air pockets or trapping of water inside of booms.
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