Question 3 GLI04 - Mate of LT 500-1600 GRT

The Correct Answer is A **Why option A ("A law enforcement vessel") is correct:** Under the Inland Navigation Rules, a vessel belonging to a law enforcement agency and using the light when engaged in official duties may display a flashing blue light. This light specifically identifies the vessel as a law enforcement or government agency vessel involved in official functions, making it easily identifiable, especially at night or in low visibility. **Why the other options are incorrect:** * **B) A work boat:** Work boats (vessels constrained by their draft or engaged in dredging/surveying operations) generally display specific combinations of red and white lights and shapes (like all-round red, white, and green lights), but not typically a flashing blue light for identification as a work boat. * **C) A vessel engaged in a race:** Vessels engaged in a race, particularly sailing vessels, do not have a standard requirement under the Navigation Rules to display a flashing blue light. They follow standard lighting requirements or specific race instructions. * **D) A vessel transferring hazardous cargo:** Vessels involved in the transfer or carriage of hazardous cargo must adhere to specific regulations (like displaying appropriate shapes or warning signs during transfer), but the display of a flashing blue light is not the prescribed indicator for this activity under the Navigation Rules.