1) The provision of buoys 
• (n.) Buoys, taken collectively; a series of buoys, as for the guidance of vessels into or out of port; the providing of buoys.
Buoy'age noun Buoys, taken collectively; a series of buoys, as for the guidance of vessels into or out of port; the providing of buoys. 
a system of buoys. · the provision of buoys. · a fee for the use of a mooring buoy.