The UN Convention on the Law of the Sea defines an Exclusive Economic Zone of 200nm from the shore of each country.
The UK has invested in offshore wind farms.
One of the contentious issues of these installations is the visual impact from the shore. Tourist destinations oftentimes take pride in their sea view, and interruptions to this can be politically difficult.
If we assume a cliff top elevation of 35 meters, the horizon is ~11.5nm away.
Offshore turbines are ~80 meters high.
In order to completely hide these turbines from view, therefore, they would need to be located ~21nm away from the shoreline.
If the EEZ is 200nm, why are wind farms not typically located out of sight of the shoreline?