Which classification marking indicates CONFIDENTIAL ATOMAL information?

The classification marking that indicates CONFIDENTIAL ATOMAL information is marked as //NC-A. This designation is specifically used within the context of national security to refer to information that, if disclosed without authorization, could cause damage to national security. ATOMAL refers to a specific category of information pertaining to atomic energy or weapons, emphasizing the sensitivity and the potential risk associated with such data.

Understanding the significance of the marking is crucial in comprehensively grasping how classified information is protected. The //NC notation indicates the level of classification, where 'N' stands for national security and 'C' represents the confidential status. The suffix '-A' denotes the ATOMAL classification, indicating that the information is not just confidential but falls under a specific regulatory framework that governs atomic-related data. This highlights the framework's structure regarding how sensitive information is handled and categorized within various branches of government or military operations.