Blake sailboat painting

Very large (roughly 5' x 6') oil on canvas painting of a few sailboats.  There is some raised paint (looks kind of like stucco) for the waves. I know it is at least 20 years old, but other than that I know very little about it.  There is a signature in the bottom left corner that says "Blake".  I've included a picture of the whole artwork as well as the signature. 

Good