Question 3 MODU01 - Offshore Installation Manager

The Correct Answer is A **Why option A ("A law enforcement vessel") is correct:** Under the Inland Navigation Rules (33 CFR Subchapter E), a flashing blue light is a specific signal reserved for use by **law enforcement vessels** of the United States, including those of the Federal government or State/local governments. This signal is used to signify that the vessel is actively engaged in law enforcement duties. **Why the other options are incorrect:** * **B) A work boat:** Work boats typically display specific shapes (like two black balls in a vertical line for a vessel restricted in its ability to maneuver) or certain white, red, or green navigation lights, but the flashing blue light is not the designated signal for a standard work boat. * **C) A vessel engaged in a race:** Vessels engaged in races do not have a special navigational light signal defined by the Inland Rules. They are generally required to abide by the standard rules or display signals relevant to their maneuvering status if applicable, but not a flashing blue light. * **D) A vessel transferring hazardous cargo:** Vessels handling hazardous cargo do not use a flashing blue light. While they may take specific precautions and may be required to notify authorities, their lighting display is governed by standard navigation or anchoring rules, not a unique blue flashing light.