I don't know why I'm so amused to find out that Wikipedia has an entry with five-step instructions for taking a Navy shower, but I am (via). I had to take Navy showers during water rationing in Okinawa and I don't look upon the experience fondly, even if it does save gigantic quantities of water (often due to showers avoided). It's not that different from Japanese showering, but you don't have a nice warm bath waiting for you.

The Navy shower article took me to Wikipedia's article on Bathing, which comes with the notice: "This article may require cleanup to meet Wikipedia's quality standards."