Why is a warning sign displayed at the gangway or access point of a barge during cargo transfer?

Correct Answer: Option A — To keep visitors away from the barge

33 CFR 154.740 requires warning signs at the gangway to restrict unauthorized access during cargo transfer. This ensures that only essential personnel are present, reducing the risk of accidents, ignition sources, or interference with critical operations during the transfer of hazardous bulk liquid cargoes.