Now squire Dvorak, dofs cap, i have checked this over and the horizon as I can tell is correct in lightroom and took shot in camera with the level indicator, yet it still is doing my head in. Dovestones resevoir (4) by David Stanley, on Flickr
First of all, it's a lovely shot and the boat makes it. But, my main worry about iffy horizons is that we'd all fall off the edge of the world. And that yacht looks like it will soon anyway. Or the dam edge! He he. Nice one.
The yacht makes it, without the yacht the picture would be rather bland, but it's inclusion results in a good image.
As said. Lovely light on the yacht. Trick I was once told for iffy horizons. Make sure the object and its reflection are on the vertical. Not so easy when the reflection is not clear but it can help. Yours looks fine as far as I can tell.
I really like this. The white of the sails and the blue of the water match the sky and clouds perfectly. Spending a bit of time looking at it, the lines don't bother me that much