where is the wind turbine and tidal energy generator ??

Yeah, things usually turn out that way. It seems like it a good idea but id bet the efficiency would be low enough that it would be better to just have separate machines. Maybe if you scale it up enough it would be worthwhile

It looks like those wind generators are anchored somewhere below the surface which makes sense. Could you attach something along the shaft that will rise and fall with the surface level to also help generate power? I know ive seen theoretical machines that can harness waves for energy and it seems like you could combine these two methods into one apparatus