As long as they are onshore, I don't think they will pose much of a problem for yachtsmen although they may prove a bit of an eye sore. The people who are going to complain are those who live nearby because, if they are anything like the ones I have seen and heard in Spain and elsewhere, they are infernally loud and visually very intrusive.
That said, they are better than a smoke belching powerstation and as green as an under-ripe gooseberry so we have to support them, don't we.
How many wind farms do we need to build to replace on moderate sized powerstation?
Lets think a bit about th eoff shore variety. Will the sails/aerofoils clear masts? Will they create calm areas where we can't sail? If they come in flotillas or batalions, will they make large no go area in the sea? I think tye might be a dreadful menace.
The Anglia TV website had this little news story the other day:-
"Three major off-shore wind farms are set to be built in our region. It is part of a national strategy to increase Britain's supply of wind powered electricity. Two are set to be built in Norfolk - one site is 4 miles out to sea from Mundesley, near Cromer. The second is one a half miles off the coast at Caister, on Scroby Sands. In Essex - there are plans for a wind farm four miles out from Clacton-on-Sea. It is proposed each farm will hold 30 wind turbines."
Have not heard from you lately Vyv, Where have you been? I cannot agree that "it is doubtful that operational costs will be recovered by power generated" These masts are being constructed for/by commercial organisations, and they would not be involved unless it paid.
I have seen wind farms in Wales and Portugal, and neither of these made any significant noise. Wind in the trees makes a lot of noise. I suspect that the noise argument is put forward by those that oppose everything new.