According to NAVFAC P-307, which of the following is a primary responsibility of the rigger in charge?

• A. Establish the method of communications and provides a signal to the operator
• B. Direct the crane operator
• C. Inspect the load for hazards
• D. Calculate the crane's load chart

Answer: (A)

The main thing being tested is who sets up and uses the signaling system for a lift. The rigger in charge is the one who establishes how everyone will communicate and the exact signals the crane operator must follow. This creates a clear, unambiguous plan before any movement starts and keeps the operator’s actions aligned with the rigging team’s intent throughout the lift. With a defined method of communication—whether standard hand signals or radios—and confirmed understanding among all personnel, the lift proceeds safely and the risk of misinterpretation is greatly reduced.

Other duties, like inspecting the load for hazards or handling calculations related to the crane’s load chart, are important parts of rigging work, but they are not the primary responsibility defined for the rigger in charge in NAVFAC P-307. The operator is the one who translates the signals into crane movements, guided by the established communication plan.