Which of the following statements is true concerning the use of railroad supplied electronic devices?

The correct statement reflects that railroad-supplied electronic devices can indeed be utilized after a safety briefing with all crew members. This practice ensures that all team members are aware of how to safely and effectively use these devices, minimizing the risk of distractions or misunderstandings that could impact safety.

Safety briefings serve as an essential protocol to prepare the crew for the specific operational conditions they may encounter. It allows for questions and clarifications about the devices and their appropriate use. This understanding facilitates a more efficient workflow and promotes a culture of safety within the rail operation.

The other statements do not align with the policies likely in place within a railroad operation. For instance, electronic devices can be used for communication, not limited to just supervisors but potentially including all relevant personnel involved in the operation. Additionally, their use is not restricted to non-peak times; rather, it is the context of the operation and adherence to safety protocols that guide their usage.