What must occur before conducting hot-work repairs on a barge after discharging a dangerous cargo?

The requirement that the facility operator must notify the Captain of the Port before conducting welding or hot-work after the discharge of a dangerous cargo is critical for ensuring safety and compliance with regulatory standards. Dangerous cargoes, especially those that are flammable or hazardous, can leave residues or vapors that may present significant risks during hot-work activities, such as welding or cutting.

By notifying the Captain of the Port, proper assessments can be made regarding the safety of the area where repairs are to occur. This notification allows for additional oversight and precautionary measures, such as safety inspections and the establishment of safety zones, which protect both the workers involved in the repairs and the surrounding environment from potential hazards.

The other options present alternative scenarios that do not adequately address the necessary safety protocols when dealing with potential residual risks from dangerous cargoes. This underscores the importance of compliance and proactive safety measures in handling hot-work operations in such contexts.