What is the function of an LMI (load moment indicator) in crane operation?

The load moment indicator (LMI) serves a critical role in crane operation by helping to prevent crane overloading. An LMI continuously monitors the load being lifted in relation to the crane's lifting capacity. It provides real-time feedback to the operator, which is essential for ensuring that the crane does not exceed its safe lifting limits. When a load approaches the maximum rated capacity, the LMI can issue warnings or alarms, which helps the operator make informed decisions regarding load handling and ensures safety on the job site. By preventing overload situations, the LMI contributes significantly to operational safety and efficiency in crane operations. The other options do not reflect the primary purpose of the LMI; for instance, it does not assist with maintenance, signal the crane's position, or measure environmental factors like wind speed.