What does the sign used to caution persons approaching the gangway of a tank barge during cargo transfer read?

Correct Answer: Option C — "Warning, No Smoking, No Open Lights, No Visitors"

33 CFR 155.780 mandates that during cargo transfer, a warning sign must be displayed at the gangway. The sign must read: "Warning, No Smoking, No Open Lights, No Visitors." This is a critical safety measure to prevent ignition sources from entering the hazardous area during bulk liquid transfer operations.