Question 2 GLI04 - Mate of LT 500-1600 GRT

The Correct Answer is A **Explanation for Option A (flashing blue light):** In inland waters (which the question specifies), a flashing blue light is the internationally recognized and federally mandated signal used by law enforcement vessels, including those operated by police and authorized federal agencies. This light is displayed when engaged in enforcement duties, similar to the blue lights used on police cars. **Explanation for other options:** * **B) flashing amber light:** A flashing amber (or yellow) light is typically used in inland waters to indicate a dredge or a vessel engaged in operations that restrict maneuverability (such as towing or survey work), or sometimes as a warning light on vessels performing specific duties (e.g., pilot boats), but it is generally not reserved for identifying law enforcement. * **C) blue flag:** Flags are primarily used for signaling, distress, or national identification (ensign). While certain organizations may have specific flags, a blue flag is not a recognized or authorized primary visual signal designated solely for law enforcement identification under the Inland Navigation Rules. * **D) flashing red light:** A flashing red light is typically used as a distress signal (when combined with other signals) or is associated with obstruction marking or specific regulatory buoys, but it is not the standard identifying light for law enforcement vessels. Law enforcement vessels use a flashing **blue** light.