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A navy shower (also known as a "sea shower", "military shower" or "staggered shower") is a method of showering that allows for significant conservation of water and energy by turning off water during the "middle" portion. An initial thirty seconds or so are used to get wet, followed by soap and lather without running water, which is then rinsed off in a minute or less. The total time for the water being on is typically under two minutes.
Navy showers originated on naval ships, where supplies of fresh water were often scarce. Using this method, crew members were able to stay clean, while conserving their limited water supply. The idea has been adopted by many people who wish to conserve water and the energy needed to heat the water, for both environmental and economic reasons. After conventional air conditioning and conventional air heating, conventional water heating is the biggest user of energy in the home, according to the US Department of Energy. Environment