What do the three white lights in a vertical...

Study

Question 1 of 2066636ee928f7522a1c51a304

What do the three white lights in a vertical line on a multiple-span bridge indicate?

Back

Question 1 of 20

66636ee928f7522a1c51a304

What do the three white lights in a vertical line on a multiple-span bridge indicate?

No comments yet

Be the first to share your thoughts!

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

🔍 Key Concepts

• Inland bridge lighting signals used to mark safe spans for navigation • Difference between lights marking safe channel spans vs. lights marking hazards/obstructions • How vertical light arrangements on bridges guide vessel operators at night

💭 Think About

• Ask yourself: when approaching a multiple‑span bridge at night, what light pattern helps you find the safest or preferred span to pass under? • Which choice describes information that would be most important for choosing a span before you get close, rather than warning you about something right above you? • Think about how many different signals would be needed: one type to mark the best span, and different ones to mark closed or obstructed areas. Which of the options sounds like a "positive" indication versus a "warning"?

✅ Before You Answer

• Verify which signal is used to indicate the best or main navigational channel on a bridge with many spans. • Check what kind of marking would normally be used if vertical clearance is reduced by scaffolding or construction—would it be a general bridge signal or local safety marking? • Consider whether an "inoperable draw span" would be shown by a standard fixed light pattern on the bridge, or by day shapes, notices to mariners, or other special signals.

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

Quick actions

— No credit card needed

Study

Question 1 of 2066636ee928f7522a1c51a304

What do the three white lights in a vertical line on a multiple-span bridge indicate?

Back

Question 1 of 20

66636ee928f7522a1c51a304

What do the three white lights in a vertical line on a multiple-span bridge 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