Sailing is easy, and it does not require all five senses to do. Boats don't know if a limb is missing or the skipper is blind. The only sense that is indeed required is touch. The boat and the elements feed all the information needed. If one can feel the boat, the tiller, and the amount of heel it has, her motion through the water, where the wind is blowing from, then you can sail. According to Kris, the most challenging point of sail is downwind. The apparent wind is gone, and there is not much pressure on the rudder.
