S.L. 425.1 Art. 30Nun buoys.

At each end of the seaward extremity of any tunny net, there shall be moored a nun buoy of such size that its diameter at the water line is not less than one metre and the vertical height from its apex to the water line is one point five metres. Such buoy is to be surmounted by a cage or ball three hundred millimetres in diameter fitted on a staff, the vertical height from the top of the cage or ball to the water line to be not less than two point seven five metres.