How do you signal to 'apply air brake'?

To signal to 'apply air brake,' the correct method involves swinging the arm horizontally above the head. This gesture is widely recognized in railway operations as a standard signal for the application of air brakes. The use of an overhead signal serves to ensure visibility and clarity for the crew and anyone involved in train operations. By raising your arm above your head, you help ensure that the signal can be noticed from a distance, minimizing the risk of miscommunication, especially in busy or noisy environments.

This signaling technique is aligned with established railway procedures and guidelines, making it a critical aspect of ensuring safe operations. The consistency in using this gesture aids in training and communication among railway personnel, allowing for effective teamwork and safety practices in managing train operations.