What safety measure should be implemented if the crane operator's view of the hoist drum is obstructed?

The use of a drum rotation indicator is an effective safety measure for situations where the crane operator's view of the hoist drum is obstructed. This device provides real-time feedback about the rotation of the drum, allowing the operator to be aware of the load's movement and position without having a direct line of sight. By receiving accurate information about whether the drum is rotating or static, the operator can make informed decisions while ensuring the load handling process is safe.

Implementing a drum rotation indicator opens up the ability to continue operations under controlled conditions, as it addresses the visibility issue by supplying critical information that would otherwise be lacking. This safety measure enhances the operator's situational awareness, helping to prevent accidents and improve overall safety during crane operations.