Which of the following is a duty of the Chief Master At Arms?

The role of the Chief Master at Arms primarily revolves around law enforcement and security duties within the naval context. Conducting investigations and navigating Non-Judicial Punishment (NJP) procedures is a critical responsibility, as it involves maintaining order and discipline among personnel. This position includes investigating incidents, preparing reports, and recommending actions based on findings, which are essential tasks in ensuring the naval unit's compliance with regulations and standards.

The other options, while important roles within the naval structure, do not align with the core responsibilities typically designated to the Chief Master at Arms. Managing ship repair schedules, for example, is generally the purview of engineering or maintenance personnel rather than a security officer. Similarly, training personnel on weapons systems is typically the responsibility of specific training officers or weapon instructors. Overseeing supply chain logistics falls under the supply officer's domain, focusing on inventory management and resources rather than security matters. This delineation of duties highlights the specialized nature of the Chief Master at Arms position in maintaining discipline and security within the force.