INLAND ONLY A vessel engaged in public safety activities may display an alternately flashing red and yellow light. This special light may be used by a vessel engaged in which of the following?

Correct Answer: Option B — firefighting

33 CFR 83.34(h) authorizes vessels engaged in public safety activities, including firefighting, to display an alternately flashing red and yellow light. This signal is intended to alert other vessels to the presence of a public safety unit, ensuring that the firefighting vessel can operate safely and effectively.