What must be done after confirming a signal in the cab by all crewmembers?

When a signal is confirmed in the cab by all crewmembers, it is essential to call it out one last time. This step serves multiple purposes: it acts as a final confirmation of mutual understanding among the crew regarding the signal's aspect and ensures that everyone is aware of the next actions to be taken. By calling out the signal, the railroad crew enhances communication, reduces the risk of misinterpretation of the signal, and increases overall safety on the train.

Effective communication is critical in rail operations, particularly when dealing with changing signals, as miscommunications can lead to serious safety incidents. Therefore, this last call out serves as a double-check mechanism before proceeding, reinforcing that all crewmembers are aligned in their understanding of the current situation.