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. Maritime cruisers often take navy showers when they aren't in a port with easy access to fresh water. A ten-minute shower takes as much as 230 L (60 U.S. gallons) of water, while a navy shower usually takes as little as 11 L (3 U.S. gallons); one person can save 56,000 L (15,000 U.S. gallons) per year.
The United States Navy phrase Hollywood shower contrasts with navy shower, and refers to long lavish showers without limits on water usage – typically given as a reward for navy personnel at sea or following excess water production by the ship's distilling plant occurred, frequently taken by the ship's engineering department.