PQS does not apply to which of the following systems?

PQS, or Personnel Qualification Standards, are designed to ensure that personnel are properly trained and qualified in various systems aboard naval vessels. In the context of the options provided, nuclear propulsion systems are highly specialized and subject to rigorous standards set by the Navy and the Department of Defense. These systems require a comprehensive understanding of complex engineering principles, safety protocols, and operational procedures.

The training and qualification standards for nuclear propulsion are unique and differ significantly from those of other systems, as they involve nuclear safety, reactor operations, and strict regulatory compliance. Consequently, PQS as applied to the other systems—like surface to air systems, torpedo firing systems, and Coast Guard weapons systems—does not encompass nuclear propulsion due to the specialized nature and regulatory frameworks governing nuclear technology. The complexity and critical safety concerns involved in operating nuclear propulsion systems necessitate a different approach to training and qualification, thereby excluding them from the standard PQS framework.