INLAND ONLY A law enforcement vessel patrolling a marine regatta may exhibit a flashing blue light or which of the following alternates?

Correct Answer: Option B — an alternately flashing red and yellow light

33 CFR 83.34(h) allows law enforcement vessels to exhibit a flashing blue light. Alternatively, these vessels may display an alternately flashing red and yellow light, which serves as a recognized signal for public safety activities, ensuring high visibility and clear identification during marine regattas or emergency operations.