Which device is a Category 1 operator aid?

• A. Boom hoist limiting device
• B. Load weighing device
• C. Outrigger position monitor
• D. Hoist drum rotation indicator

Answer: (A)

Category 1 operator aids are basic safety features that automatically limit or constrain crane movement, helping the operator without requiring extra action. A boom hoist limiting device fits this because it automatically stops or restricts hoist movement once a preset limit is reached, preventing unsafe configurations and reducing the chance of over-travel. The other devices mainly provide information for the operator to assess and respond to, rather than automatically enforcing safe limits. So, the boom hoist limiting device is the Category 1 operator aid.