What classifications of naval place of confinement are authorized for use when no other facility is available?

The classifications of naval places of confinement authorized for use when no other facility is available are C3 and C4. These classifications serve specific purposes within the confinement system. C3 facilities are used for the confinement of personnel who are awaiting trial, while C4 facilities are designated for individuals who require confinement due to disciplinary actions but do not need the stringent security measures found in higher classifications.

These classifications allow for flexibility in managing personnel who may not be a direct threat to security but still need to be confined for various reasons. The C class facilities are less restrictive compared to A class facilities, which are typically used for more severe cases or individuals who pose a greater danger. This distinction is crucial for proper classification and management of naval personnel in a confinement setting, ensuring that resources are used efficiently while maintaining security and order.