“You should be neat, clean, and presentable at all times…. Beards are not permitted except when medically authorized, and then only until the problem clears up. If you wear a mustache, keep it trimmed and neat. Don’t grow your mustache below the top line of your upper lip and do not allow it to extend more than 1/4 inch beyond the corners of your mouth.”—Excerpt from Blue Jacket Manual, distributed at US Navy Bootcamp