A BRIG is a type of prison used on ships, typically for sailors who have committed a crime or violated the rules. It is a small, enclosed area with limited space and amenities, and is usually located near the ship's stern. Sailors' prisons, or brigs, were used to punish sailors for minor offenses such as fighting, theft, or insubordination. The punishment could range from confinement to physical labor, depending on the severity of the offense.