Question 383 Rules of the Road

The correct answer is B) an alternately flashing red and yellow light. According to the U.S. Coast Guard regulations, law enforcement vessels patrolling a marine regatta are permitted to exhibit an alternately flashing red and yellow light as an alternate to a flashing blue light. This visual signal helps alert other vessels in the area that a law enforcement vessel is present and operating. The other options are incorrect because: A) two amber lights in a horizontal line is not a recognized signal for law enforcement vessels, C) a fixed green light over a red flashing light is used for certain navigational purposes, not law enforcement, and D) a high intensity flashing white light is used for different purposes, such as signaling distress.