If the secondary RCT battery dies, what action must the primary RCO take to continue working?

When the secondary Remote Control Tablet (RCT) battery dies, the primary RCO can take immediate action to ensure continued operation by re-linking the RCT and selecting "no" to link. This process allows the primary RCO to gain control over the system using the existing RCT setup without needing to replace batteries or activate backups. Re-linking effectively refreshes the connection and may allow the operator to circumvent any issues caused by the dead battery in the secondary controller.

The choice to manually control the train or activate a backup RCT, while possible alternatives, may introduce unnecessary complexity or delay in regaining control. Similarly, replacing the battery might not be the most efficient first step, as it requires time and may not be immediately feasible in a fast-paced operational environment. Thus, the action of re-linking the RCT is the most direct and effective method to continue work until a more permanent solution can be addressed.