It is important that the Buoy selected is capable of supporting the combined weight of your Anchor and Chain and we recommend that a Ratio of 2:1 is used as an absolute minimum as the buoy will do all the lifting required to break the anchor free from the seabed.
For example, an anchor and chain with a combined weight of 30kg will require a buoy with a reserve buoyancy of 60kg as a minimum. If you use a smaller buoy then you risk the buoy imploding under the water pressure as the buoy is forced to lift the anchor and chain using the buoyancy it has.
It is always a better option to use a larger buoy as this puts less stress on the boat, increases the working life of the buoy and also has the additional benefit of being clearly visible to other boats operating in the area and also when the sea state is not calm.