Single handed sailing was surely not what it used to be. Now the isolation was more illusion than reality. If he should encounter serious trouble, his position would be marked from satellites and a hover craft would be on site within two hours.
Hell, they probably would even have a photograph of his terror stricken face. Of course the insurance bill would be hefty, but it was the law. The illusion was fine though, he could really feel himself to be the last (or the first) man on earth.