Which role is considered the third person in the chain of command?

In a typical military structure, the chain of command is critical for maintaining order and efficiency. The third person in the chain of command is often designated to support and facilitate communication between the higher command and the personnel under them. The Assistant Class Officer is responsible for assisting in the management and training of personnel, while also serving as a liaison between the Class Officer and the students.

This position typically holds authority after the Class Officer and their direct superior, thereby making it an integral part of ensuring that orders and information flow properly through the ranks. The role is significant as it encompasses responsibility for operational efficiency and provides support on routine matters, helping to alleviate the Class Officer's workload.

The other roles mentioned might assist or have an important function in the training environment, but they do not fit the hierarchical designation of being the third in command as well as the Assistant Class Officer does. The Class Chief Petty Officer, Class Instructor, and Section Leader have distinct responsibilities that do not place them directly in the chain that supports the Class Officer in the same way.