What does the horn signal "O-O" indicate?

The horn signal "O-O" is specifically designated for situations involving a fire or smoke condition on a train. When this signal is used, it serves as a critical communication tool for alerting crew members or responders about the emergency situation. Understanding this signal is vital for the safety and effective response to potential fire hazards, which can escalate quickly if not addressed properly.

Recognizing the importance of clear communication during emergencies helps ensure that all personnel are on the same page and can take immediate action, such as evacuating passengers, securing the area, or notifying emergency services. Using "O-O" in emergencies highlights the proactive measures taken to maintain safety and reflects the operating procedures established within the LIRR framework.

Effective knowledge of these signals contributes to a safer operating environment and reinforces the protocols that staff must follow in unusual or critical situations.