What does it imply if a signal person raises both arms vertically?

When a signal person raises both arms vertically, it is universally recognized as a signal to stop operations. This gesture is clear and visible from a distance, making it an effective way to communicate the need for immediate cessation of work to ensure safety. In construction and lifting operations, the ability to quickly signal a stop is crucial. Such a signal can be used to prevent accidents or respond to unforeseen hazards.

Understanding this gesture is vital for the safety and efficiency of any lifting operation, as it ensures that everyone on site recognizes the need to halt activities promptly. This action helps maintain a safe working environment, allowing workers to assess any potential issues or dangers before proceeding.