🔍 Key Concepts

• INLAND Navigation Rules special lights for law enforcement vessels • Difference between blue flashing lights and other special-purpose lights (like towing, wreck marking, or air-cushion craft) • Which lights are commonly used for identification of authority vs. general warning or obstruction

💭 Think About

• Look at the Inland Rules section that discusses law enforcement vessels and note whether it allows any alternate signal besides the blue light. • Ask yourself: which of these choices looks like a signal used by authority or emergency services, and which are used for other specific purposes on the water? • Consider which of these light setups you have seen associated with police, Coast Guard, or harbor patrol rather than with navigation marks or special operations.

✅ Before You Answer

• Verify in the Inland Navigation Rules that flashing blue light is specifically tied to law enforcement vessels. • Check whether the Rule mentions any alternate color or pattern that may be used in addition to, or instead of, the blue light. • Eliminate any options that you recognize as lights for aids to navigation, towing, or special operations rather than law enforcement.