What information must be specified to the engineer when using radio communication for shoving movement?

When conducting shoving movements, it is vital for the engineer to have precise information regarding both distance and direction. This ensures that the movement is conducted safely and effectively, minimizing the risk of accidents or operational errors. Specifying the distance allows the engineer to understand how far the movement needs to go, while the direction ensures that the train is moving towards the intended destination or away from hazards.

In a rail yard setting, where shoving movements are common, clear and accurate communication is essential. The engineer relies on this information to prepare for the stopping point of the movement and to coordinate with other crew members as needed. Miscommunication or ambiguity could lead to unsafe situations, such as a train passing a signal without permission or moving into an area where workers are present.

While other options may provide helpful information in specific contexts, they do not encompass the complete set of details required for safe shoving operations. Communicating only time, only distance, or types of cars would not provide the engineer with the comprehensive situational awareness needed to manage the movement properly.