The sign used to caution persons approaching the gangway of a tank barge during cargo transfer reads __________.

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

USCG marine transfer regulations mandate specific warning signage at the vessel's gangway. The required notice explicitly states "Warning, No Smoking, No Open Lights, No Visitors" to mitigate ignition sources during hazardous transfer operations.