The mooring buoy's sole purpose is to support the mooring chain.
The preferred designs for mooring buoys are a traditional buoy with hardware or a buoy with a tube through the center.
Both designs offer reliable flotation and will last for several seasons, depending on the salinity of the water.
Freshwater applications will obviously extend the useful life of any mooring system.
A properly designed permanent mooring system should securely position a boat so that it can be left unattended for long periods of time with little attention.
Each system usually consists of a mooring buoy (to float the chain), a mooring anchor, and a length of chain (running between the anchor and the mooring buoy).
The proper ground tackle also includes correctly sized galvanized shackles and swivels.
Always keep in mind that the mooring system is only as reliable as the current conditions of the environment.
All Sur-Moor Buoys by Taylor Made are built to withstand the constant abuse of most mooring environments.