Question 2 ONC04 - Mate of LT 500-1600 GRT

The Correct Answer is A **Explanation for A (flashing blue light):** A flashing blue light is the internationally recognized signal used by law enforcement, police, or patrol vessels to indicate their status and/or to signal for a vessel to stop or yield. In inland waters, this light serves as the primary identification mark for official law enforcement boats. **Explanation for Incorrect Options:** * **B) flashing amber light:** A flashing amber (or yellow) light is typically used to signify special purpose vessels, such as dredges, towboats pushing ahead, or vessels involved in specific commercial activities (like surveying or bridge construction), but not specifically for general law enforcement identification. * **C) blue flag:** While flags can be used for identification, a blue flag is not a standardized or legally mandated signal for identifying a law enforcement boat according to inland navigation rules. Visual signals for law enforcement primarily rely on lights. * **D) flashing red light:** A flashing red light has specific meanings under the navigation rules (e.g., restricted visibility signals or certain vessel status indications) and is not the designated signal for identifying a standard law enforcement patrol boat.