What letter indicates a ruptured system on a ship?

In maritime terminology, particularly in the context of ship operations and maintenance, various symbols and letters are used to communicate the status of systems aboard a vessel. The letter that designates a ruptured system is "R." This letter is a standard convention used in engineering diagrams and operational checklists to clearly indicate that a particular system has failed or experienced a rupture. Identifying such a failure is crucial for the safety and integrity of the ship, as it allows for immediate action to mitigate any potential hazards or damage.

Understanding this labeling system is important for crew members and engineers, as it aids in quick assessments and decision-making processes during emergencies or regular inspections. The other letters do not have the same connotation in this context and typically represent different statuses or systems that do not indicate a rupture.