What does a banks-man signify with two hands moving vertically together?

The correct interpretation of a banks-man signaling with two hands moving vertically together is that they are showing the distance to a hazard. This gesture provides important visual information to those within the vicinity about the proximity of a potential danger. Such signals are crucial, especially in environments where visibility can be compromised or where noise can hinder communication.

In the context of operational safety, it is essential for a banks-man to effectively communicate and help facilitate safe movements in potentially hazardous situations, like construction sites or areas with moving vehicles. By indicating distance to a hazard, they assist others in making informed decisions about their movements, ensuring safety protocols are followed effectively.