What is the proper acknowledgment a climber must hear, in response to "Stand clear," before proceeding?

The proper acknowledgment a climber must hear in response to "Stand clear" is typically "All clear." This phrase serves as a safety confirmation that the area is free of obstacles and that it is safe for the climber to proceed with their operation. It ensures that everyone involved is aware of the climber's intentions and that they have the go-ahead to continue.

Using "All clear" is standardized in many climbing and tree care operations as it minimizes confusion. It clearly indicates the condition of the surrounding area after the command has been given. Effective communication is critical in this context, as it helps prevent accidents and injuries that could result from misinterpretation or a lack of confirmation. Ensuring everyone is on the same page fosters a safer working environment.

The other phrases may not effectively communicate the necessary safety clearance. For instance, "Proceed" may suggest readiness but does not explicitly confirm that there is no risk of obstacles. "Understood" indicates acknowledgment but does not give a clear safety status. "Ready when you are" implies readiness but similarly lacks the crucial confirmation of a clear surrounding area. Hence, "All clear" stands out as the most appropriate and universally understood response in this scenario.