What should a signal person do if they lose sight of the crane operator?

When a signal person loses sight of the crane operator, it is crucial that they immediately stop signaling to prevent any potential accidents. This action is fundamental for safety because without visual contact, the operator might not be able to interpret signals accurately, leading to misunderstandings that could result in dangerous situations. Stopping the signals ensures that no conflicting or misleading instructions reach the operator, allowing for a safe environment until communication can be re-established.

Maintaining safety as a priority means that any uncertainty regarding the operator's ability to see or understand signals must be addressed before continuing operations. Continuing to signal without visual contact could increase the risk of accidents significantly.