National Geographic : 1959 Jul
On the Sea: Slim Rations of Water for Drinking Creeping across the Atlantic's vast expanse in slow-motion, we soon felt the discomfort of thirst. Anticipating such a problem, we had brought along plastic stills which, in theory, would use the sun's heat to distill fresh water from salt. Here Rosemary inflates the apparatus while I rig it for trailing behind the boat. Hours later (below) the still had yet to produce a drop of fresh liquid. Repeated failure convinced us that it required calm seas to function. Eying the compass at center, I handle the tiller with my foot, an easy-enough task at our average three-knot speed.