I had no idea that the US Navy had such a regulation:
Sailors aboard the cruiser Shiloh during the 26-month command of Capt. Adam M. Aycock often worried about the CO’s use of one of the Navy’s most arcane punishments: confinement for three days in the brig while being fed only bread and water.
Over time, Aycock’s proclivity for using bread and water to punish junior sailors became well-known on the Yokosuka, Japan, waterfront, where the Shiloh is based, according to sailor comments in three of the ship’s command climate surveys.
“I do not wear my ballcap at the (Navy Exchange store),” one sailor wrote. “Even the taxi drivers on base know us for being the ‘USS Bread and Water.’” [Navy Times]
You can read the rest at the link, but I am willing to be that many servicemembers would rather suck up three days of bread and water instead of getting hit with extra duty and restriction of up to 45 days through the Article 15 process.