How many SSACs are located in total across the MMRs and RARs?

The total number of Submarine Systems Automation Controllers (SSACs) in the Main Machinery Rooms (MMRs) and Reactor Auxiliary Rooms (RARs) is indeed four. These systems play a critical role in monitoring and controlling various machinery and processes within nuclear-powered vessels, ensuring safe and efficient operation.

In the context of the MMRs and RARs, SSACs are key components that provide automated control and monitoring capabilities. Their design and placement are strategically intended to ensure redundancy and reliability, which is essential in nuclear operations. Each SSAC contributes to the overall safety and functionality of the ship's propulsion and power systems, enabling swift operational responses to any anomalies or changes in system status.

Understanding the configuration and quantity of these controllers is vital for personnel to ensure they can effectively operate and troubleshoot systems as needed. The knowledge of having four SSACs helps prepare crew members for practical procedures and system management in their roles.