Question 389 Rules of the Road

The correct answer is D) patrolling a regatta. Vessels engaged in public safety activities, such as law enforcement or search and rescue operations, are permitted to display an alternately flashing red and yellow light. This special light is used to identify the vessel as engaged in public safety activities and to alert other vessels in the area to exercise caution. The other answer choices are incorrect because: A) law enforcement is a valid use of the alternately flashing red and yellow light, B) a pair of trawlers hauling nets would not be considered a public safety activity, and C) river bank protection is not a typical public safety activity that would warrant the use of this special light.