Information that must be copied can be transmitted to moving equipment when?

The correct answer focuses on the importance of ensuring that information is transmitted in a manner that prioritizes safety and operational efficiency. When transmitting information to moving equipment, the critical aspect is that it can be received and copied safely. This means that the transmission should occur when it is clear that the operator or relevant personnel can adequately process the information without distraction or risk, maintaining safe operation during movement.

Safety protocols dictate that information transfer, especially involving crucial data essential for operations, must not compromise the situational awareness of individuals responsible for equipment control. This underscores the necessity of clear communication practices that align with operational safety while equipment is in motion.

Other options may relate to factors influencing the timing or context of the communication but do not directly address the underlying principle of ensuring that information can be safely received and understood during operations. Thus, option B best encapsulates the essential condition for effective and safe information transfer in a rail communications context.