What determines the security classification for naval correspondence?

The determination of the security classification for naval correspondence is primarily based on the information contained within that correspondence. This means that the nature and sensitivity of the information being communicated dictate how it should be classified in terms of security. If the correspondence includes classified information regarding operations, personnel, or national security, it will be assigned a specific classification level to ensure that it is handled appropriately and protected from unauthorized access.

The other factors, while they may play a role in context, ultimately do not dictate the classification on their own. For instance, the number of information addressees might affect distribution but does not influence the sensitivity of the content. Similarly, the classifications of related documents or references can inform context but do not override the intrinsic classification determined by the actual information contained within the correspondence. Thus, the information itself remains the central determinant for security classification.