Non-metal floats for personal watercraft; non-metal floats for docks for kayaks, canoes and paddle boards; structural and replacement parts for non-metal fixed docks, non-metal floats for use with fixed docks for mooring boats and personal watercraft, namely, floats for attachment to the docks to convey buoyancy and modified float shells for wave attenuation or diminishing dock motion; and non-metal structures, namely, rotationally molded plastic barriers in the nature of breakwaters