Drink seawater.
Drink urine.
Drink alcohol.
Smoke.
Eat, unless water is available.
16-52. Sleep and rest are the best ways of enduring periods of reduced water and food intake. However, make sure that you have enough shade when napping during the day. If the sea is rough, tie yourself to the raft, close any cover, and ride out the storm as best you can. Relax is the key word—at least try to relax.