Depth of Field

I choose one of the pictures I'd takes several years ago when we sailed under the Golden Gate. My camera in those days wasn't too good, so I tried to improve the picture a bit.  I also think that the picture is a bit out of focus so it might appear blurry.  Of course it was taken from a rocking boat since we had very little breeze on that sail.  Anyway, I tried to blur the bottom half and keep the top half in focus.  To do this I drew the gradient from the edge of the water upwards to the deck of the bridge.

Sailing  under the Golden Gate with depth of field