Under the U.S. Aids to Navigation System,...

Question 1 / 2066636ee928f7522a1c519915

Question 1 of 2066636ee928f7522a1c519915

Under the U.S. Aids to Navigation System, what does a lighted buoy with a spherical topmark mark indicate?

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Question 1 of 20

66636ee928f7522a1c519915

Under the U.S. Aids to Navigation System, what does a lighted buoy with a spherical topmark mark indicate?

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🔍 Key Concepts

• US Aids to Navigation System (IALA-B) basic buoy shapes and meanings • Difference between lateral marks (port/starboard) and safe water / special marks • Meaning of a spherical (ball) topmark on a buoy in U.S. waters

💭 Think About

• Which buoy shapes or topmarks are normally used to mark the sides of a channel versus areas that are safe all around? • Think about where you might see a spherical topmark on a chart symbol—near hazards, at mid-channel, or marking something laid on the seabed? • For each choice, ask: would that function usually be shown by a different, more distinctive shape or color pattern?

✅ Before You Answer

• Identify which buoy type in the U.S. system commonly shows a spherical (ball) topmark • Confirm which aid indicates safe water all around versus marking a danger or obstruction • Make sure you are not confusing lateral marks (port/starboard channel edges) with non-lateral marks (safe water, isolated danger, special areas)

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Question 1 of 20

Under the U.S. Aids to Navigation System, what does a lighted buoy with a spherical topmark mark indicate?

The port side of the channel

A hazard to navigation

Safe water

The position of underwater cables

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Question 1 / 2066636ee928f7522a1c519915

Question 1 of 2066636ee928f7522a1c519915

Under the U.S. Aids to Navigation System, what does a lighted buoy with a spherical topmark mark indicate?

Back

Question 1 of 20

66636ee928f7522a1c519915

Under the U.S. Aids to Navigation System, what does a lighted buoy with a spherical topmark mark indicate?

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

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed