Question 3 GLI02 - Mate of Unlimited Tonnage

The Correct Answer is A **Why Option A ("A law enforcement vessel") is correct:** Under the Inland Navigation Rules (33 CFR § 88.07), a flashing blue light is a specific signal reserved exclusively for use by a law enforcement vessel when that vessel is engaged in enforcement duties. This signal helps identify the vessel's function and purpose to other mariners. **Why Option B ("A work boat") is incorrect:** Work boats (or vessels restricted in their ability to maneuver) typically display specific lights and shapes (e.g., red-white-red lights, or ball-diamond-ball shapes) to indicate their status, but they do not use a flashing blue light. **Why Option C ("A vessel engaged in a race") is incorrect:** Vessels engaged in a race, such as sailboats, are governed by separate racing rules and use standard navigation lights (or may be exempt from displaying them during daylight hours), but they do not use a flashing blue light as a marker of their status. **Why Option D ("A vessel transferring hazardous cargo") is incorrect:** Vessels carrying or transferring hazardous cargo use standard navigation lights and may be subject to specific regulations regarding restricted areas, but the transfer of hazardous cargo itself is not indicated by a flashing blue light.