The problem:    


The incoming tide flows from the sea into the rivers and causes the navigation buoys to lean with the current towards the land. The ebbing tide is faster and makes the buoys lean towards the sea. Some of the light of the buoy is lost in the water and some shines up to the sky, the helmsman of the ship can only see the signal when he is beside it, which is not any use for him. In certain cases even an experienced local pilot may land the ship on the mud. Complaints have been received by the shipping authority about this for more than a hundred years.


The idea for a solution:


The buoy must stand upright all the time irrespective of the depth of the water or the speed of the flow.


The  solution



Where the water presses the buoy body, a “Bow wave” forms; that lifts that side of the buoy up and causes it to ride on the back of the wave. The bottom of the buoy must be shaped so, that the  side where the water leaves the buoy is lifted by the flowing water. The mooring chain must be hung a little forward of the centre of buoyancy to allow the buoy to turn with the tide; the unbalance of this must be trimmed out at the time of installation by the ballast used inside the buoy’s hull.


The superstructure or “daymark” should follow the  International Association of Lighthouse Authorities’  agreed standards  and the fixtures to suit the port authorities working practices.


Present status


The Fast water buoy is used by Trinity House, the Canadian Coast Guard(East Coast) Port of Hull  Authority and on the  Mennai Strait (Caernarfon,  United Kingdom)


The design with the associated services is commercially available from


JANKÓ and ASSOCIATES      telephone:   +44 (0)1634022552

42 Love Lane                     

Rochester,   ME1  1JD

United Kingdom