You are approaching a swing bridge at night....

Question 1 / 2707066636ee928f7522a1c519176

Question 1 of 2707066636ee928f7522a1c519176

You are approaching a swing bridge at night. How do you know that the bridge is open for river traffic?

Question 1 of 27070

You are approaching a swing bridge at night. How do you know that the bridge is open for river traffic?

🔍 Key Concepts

• Bridge light signals for drawbridges and swing bridges in 33 CFR Part 118 (Bridge Lighting and Other Signals) • Difference between a fixed (steady) light and a flashing or changing light as a signal • What indicates a bridge is closed to navigation versus open for vessel passage at night

💭 Think About

• Think about which light indication would clearly and positively tell a mariner, even from a distance, that the span is open and safe to pass through. • Consider whether an extinguished (dark) light is a reliable navigational signal, compared with a positive color or flashing pattern. • Ask yourself which color and pattern are traditionally associated with "safe to proceed" for vessel traffic on U.S. waterways, especially on bridges.

✅ Before You Answer

• Verify in 33 CFR Part 118 what specific light signal means a movable bridge span is open to navigation at night. • Check whether the rule calls for a steady green, a flashing green, or some change from red to green when the span is open. • Confirm whether a red light turning off (extinguished) is ever used as the only official signal that a drawbridge or swing bridge is open.

Question 1 of 27070

You are approaching a swing bridge at night. How do you know that the bridge is open for river traffic?

The red light changes to green

The amber light changes to green

The red light is extinguished

The fixed, green light starts to flash

Question 1 / 2707066636ee928f7522a1c519176

Question 1 of 2707066636ee928f7522a1c519176

You are approaching a swing bridge at night. How do you know that the bridge is open for river traffic?

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Question 1 of 27070

You are approaching a swing bridge at night. How do you know that the bridge is open for river traffic?