A float 1 comprising a hollow shell 5 having a front end 19 and a rear end 20, the hollow shell defining an airtight hollow interior region and a first major horizontal plane 8 that in use extends through the hollow shell 5 at its maximum horizontal cross-sectional area, and a damping projection 12 extending completely around and laterally outwardly from the hollow shell 5 that dampens the buoyant movement of the hollow shell 5 in water in a generally vertical direction with the damping projection 12 defining a second plane 14 parallel to the first major plane 8 defined by the hollow shell 5. The damping projection 12 has coupling holes 23at the front and rear ends for coupling the float 1 to a tethering rope or a mooring rope.
