Which of the following is a requirement concerning shoving checks?

The requirement concerning shoving checks emphasizes the importance of clear communication during operations involving shoving movements. Verifying distances communicated verbally ensures that all crew members are aware of the proximity of the moving equipment to any potential hazards or other crew members, thereby promoting safety and preventing accidents. This verbal communication acts as a critical safety measure, allowing everyone involved to stay coordinated and informed about the operation.

In contrast, visual protection cannot be ignored as it serves as a critical aspect of ensuring safety during shoving movements. Additionally, shoving should not occur at any speed; it must be conducted at a controlled and safe pace to minimize risk. Lastly, switch positions are indeed relevant because knowing whether a switch is aligned properly is crucial to prevent derailments or accidents. Thus, the necessity of verbal confirmation about distances aligns with safety protocols and operational standards within railroad practices.