That's all fine and dandy in a book. But on the water, I generally assume that ships either can't see me, or can't maneuver quickly enough to avoid me if they can see me, or just don't give a rat's a$$ about little sailboats. In other words, I pretty much assume that I'm as good as invisible and stay out of their way as much as possible.
And/or stay in radio contact with Big Bertha Ship. When making course changes, make them obvious.