What should a crew member announce or signal when going between cars or locomotives?

A crew member should announce or signal "Going between" when moving between cars or locomotives. This specific phrase serves as a crucial safety measure, alerting other crew members and anyone nearby that an individual is transitioning through a potentially hazardous area.

Using this phrase helps create awareness of the crew member's intentions and movements, thereby promoting safety by preventing accidental initiation of movement in the equipment or the surrounding area. The particular phrase "Going between" is standardized and conveys essential information that is understood in the context of train operations.

Other phrases like "Going forward," "All clear," or "Ready to proceed" could cause confusion or misinterpretation about the crew member's actions or location. For example, "All clear" might imply that the area is safe for movement, rather than indicating that a crew member is moving through a narrow or dangerous space between equipment. Therefore, using the precise terminology is vital for maintaining safety protocols within the crew and ensuring everyone is aware of the situation at hand.