A "brig" is a type of sailing ship that typically has two masts. It is characterized by its square rigging, which means that the sails are set perpendicular to the ship's hull. Brigs were commonly used in the 18th and 19th centuries for various purposes, including trade and naval warfare. In addition to its use as a ship, the term "brig" can also refer to a military prison on a naval vessel. This facility is used to detain sailors who have committed offenses, ensuring discipline and order within the crew. The concept of a brig is closely associated with naval operations and maritime law.