What lights would you see on the Illinois...

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Question 1 of 2066636ee928f7522a1c519ac5

What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?

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Question 1 of 20

66636ee928f7522a1c519ac5

What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?

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🔍 Key Concepts

• Inland navigation lights used on U.S. rivers and waterways • Special signal lights used near dams, wickets, and movable structures to warn of hazardous current or unsafe approaches • Difference between standard vessel navigation lights and fixed structure warning lights

💭 Think About

• Think about why a special light signal would be needed when wickets or bear traps are open or partially open—what risk does this create for approaching vessels? • Ask yourself whether the color combination in the correct choice is commonly associated with general vessel status (like side lights or towing lights) or with special hazards/structures. • Consider whether any of the color combinations look familiar from other river or lock signaling systems you’ve studied for the Western Rivers and Illinois Waterway.

✅ Before You Answer

• Verify what light combinations are specified in 33 CFR for dams and movable wickets on inland rivers, especially the Illinois Waterway. • Double‑check whether the color pair is one you normally see on a ship’s mast or side lights; if it is, ask if it would logically be reused for a fixed dam hazard signal. • Confirm that the signal specifically indicates a hazardous set or unusual current in the upper approach, not just that the lock is open or closed.

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Question 1 of 2066636ee928f7522a1c519ac5

What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?

Back

Question 1 of 20

66636ee928f7522a1c519ac5

What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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