What action must be in place to ensure the rocket ignition system is safe?

To ensure the safety of the rocket ignition system, implementing an interlock system is essential. An interlock system is designed to prevent accidental ignition by ensuring that specific conditions are met before any ignition can occur. This system typically involves a series of checks and balances that must be activated in a predefined sequence, ensuring that the rocket is in a safe state and that all operational protocols are followed.

For example, the interlock system may require that personnel are at a safe distance, the rocket is in the correct position, and any potentially dangerous conditions (such as high winds or equipment malfunctions) are mitigated prior to ignition. This adds an additional layer of safety, preventing human error and reducing the risk of accidents during launch preparations.

While other options may contribute to overall safety management in rocket operations, such as remote-launch procedures which allow operators to launch from a safe distance, and dual battery systems or fuel stabilization which can be important for ensuring power stability or fuel safety, they do not directly provide the preventative measures against unintended ignition that an interlock system does. Thus, the interlock system is crucial for the specific function of ensuring rocket ignition safety.