For mission systems, Zonal survivability is the ability of a mission system, when experiencing internal faults due to damage or equipment failure confined to adjacent zones, to continue its function, perhaps at a somewhat lower level of performance, with the surviving equipment in undamaged zones. Zonal Survivability assures the impact of damage does not propagate outside the adjacent zones in which damage is experienced. Zonal survivability requires sufficient damage control features to prevent the spreading of damage via fire or flooding to zones that were not initially damaged.