Disappointing, almost a documentary. The lead character lacked depth, it was difficult to feel much for someone about whom we were told so little? As for hidden depths, just keep looking.
Numerous mistakes in boat handling, sleeping under sail for instance. Laughable repair job. Rigging the liferaft to a sinking boat. Must have many nautical types rolling in the aisles, or grinding teeth in frustration at thee man's incompetence.
In summary, dull and predictable. Certainly not Redford's best by any means. But, to be fair, he had nothing to do other than look miserable,and get very wet .