Question 388 Rules of the Road

The correct answer is A) a law enforcement vessel. A vessel displaying a flashing blue light is an indication that the vessel is a law enforcement vessel, such as a U.S. Coast Guard vessel. This is in accordance with the U.S. Coast Guard Navigation Rules, which state that a flashing blue light is used to identify a vessel engaged in law enforcement activities. The other answer choices are incorrect because a vessel transferring dangerous cargo would not display a flashing blue light, a work boat would not have a special lighting requirement, and a vessel engaged in a race would not display a flashing blue light.