When giving verbal permission for a train to re-enter a block, how many details must be provided by the dispatcher?

When a dispatcher gives verbal permission for a train to re-enter a block, it is essential to provide five specific details to ensure clarity and safety. These details help confirm that everyone involved understands the situation and knows exactly what is required. The elements include the train's identification, the location where the train is re-entering, the block from which it is re-entering, any conditions that may affect the train's operation, and the track authority that is being conveyed.

This comprehensive information is necessary for safe operations and helps to prevent misunderstandings that could potentially lead to accidents. By providing all five details, a dispatcher ensures that the train crew has a clear understanding of their authority and the conditions of the track ahead. This communication process is critical for maintaining safety and operational efficiency on the railway.