Although only moderately related to the article, it's worth noting in this situation that the ocean could still be of use to you in maintaining water levels. A

Although only moderately related to the article, it's worth noting in this situation that the ocean could still be of use to you in maintaining water levels. Arid climates are dangerous because they force us to sweat in order to maintain body temperature, at a rate between 1L and 2L per hour, depending on how much you're exerting yourself. While you can't drink the water, you certainly can use it as a heat sink. Taking a bath and soaking your clothing in the water will both cool you down and assist in the same evaporative cooling process, reducing the amount you need to sweat. Coupling extra evaporative cooling with limited movement during the day will help you conserve a lot of water, and could extend your survival time by more than 50%.