🔍 Key Concepts

• Inland Navigation Rules Annex V special lights for dredging and pipeline operations • The meaning of flashing yellow lights used along the water’s surface • How a vessel not under command, mine clearance vessel, and vessel aground are usually marked (colors and patterns of all-round lights)

💭 Think About

• Look at where the yellow lights are located in the illustration: do they outline a hull, or do they appear as a line near the water’s surface? • Which of the four answer choices is associated in the Inland Rules with multiple flashing yellow lights used at intervals? • For a vessel aground or not under command, would you expect yellow lights, or mainly red/green/white all-round lights in a vertical pattern?

✅ Before You Answer

• Verify in the Inland Rules that flashing yellow lights in series are prescribed for a particular type of obstruction or equipment used in dredging operations. • Confirm that a vessel aground shows all-round red lights (and anchor lights), not strings of flashing yellow along the water. • Confirm that mine clearance vessels are identified by distinctive green all-round lights arranged in a specific pattern, not yellow.