Final answer:
To control the PAC3 Launching System remotely through the ECS, the 'Enable' switch, also known as the 'ECS Control' switch, must be engaged after the key is placed in the remote position. The proper procedures must be followed as per the operation manual for system safety and performance.
Step-by-step explanation:
To give the Environmental Control System (ECS) control of a PAC3 Launching System (LS) once the key has been placed in the remote position, another switch, typically referred to as the 'Enable' switch or the 'ECS Control' switch, must also be engaged. This step is important as it allows the ECS to have full command over the system's operations. The process generally involves a two-step verification to ensure safety and to prevent accidental engagement. The exact naming and location of this switch can vary depending on the specific system design and setup.
For operators, it is crucial to follow the proper checklist and procedures outlined in the operation manual for the PAC3 system. Adhering to these steps ensures the ECS can correctly regulate the temperature, pressure, and other environmental conditions within the LS necessary for optimal performance and safety.