What is the recommended action regarding the harness for both crew members during a controlled ejection?

Locking the harness for both crew members during a controlled ejection is critical for ensuring their safety and security. A locked harness secures the individual firmly to their ejection seat, preventing unnecessary movement during the ejection process. This is particularly important as the forces experienced during an ejection can be extreme, making it essential for the crew members to remain securely attached to their seats to facilitate a safer exit from the aircraft.

Additionally, the locking mechanism is designed to function under high-stress circumstances, ensuring that the harness remains in place when it matters most. This precaution helps to mitigate the risk of injury during the ejection, as a secure harness reduces the potential for the crew members to be thrown around or dislodged in the chaotic environment that accompanies an ejection scenario.

In contrast, options that involve keeping the harness loose, disconnecting it, or removing it compromise the safety protocols designed to protect the crew during an emergency ejection, exposing them to additional hazards.