How Submarine Sailors Sleep, Eat, and Survive for Months Underwater

For months at a time, submarine sailors live in one of the most extreme environments on Earth, sealed inside a steel vessel deep beneath the ocean. With no sunlight, limited personal space, and air that must be carefully recycled, every part of daily life is tightly controlled. Sailors sleep in shared bunks, eat carefully planned meals, and work rotating shifts to keep the submarine operational around the clock.