What is involved in recovering from a failed read-back or incorrect acknowledgment?

• A. The dispatcher issues a correction or cancellation, and the crew repeats the correct details to achieve proper authorization.
• B. Ignore the error and proceed.
• C. Switch to a backup channel and continue.
• D. File a complaint with the dispatcher after arrival.

Answer: (A)

Recovering from a failed read-back or incorrect acknowledgment is about reestablishing explicit authorization. The dispatcher must issue a correction or cancellation that clearly states the exact details of the movement, and then the crew repeats those corrected details to confirm that both sides have the same understanding. This re-confirmation creates a valid, verifiable track warrant before the train proceeds, preventing unsafe movements due to miscommunication. Ignoring the error or trying an alternative channel doesn’t restore proper authorization, and filing a complaint after arrival doesn’t address the immediate safety requirement of reissuing and confirming the warrant.