When the navigational channel passes under a...

Question 1 / 2707066636ee928f7522a1c519cc7

Question 1 of 2707066636ee928f7522a1c519cc7

When the navigational channel passes under a fixed bridge, the edges of the channel are marked on the bridge with what lights?

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Question 1 of 27070

When the navigational channel passes under a fixed bridge, the edges of the channel are marked on the bridge with what lights?

🔍 Key Concepts

• Aids to Navigation under Bridges in the U.S. Aids to Navigation System (USATONS) • How channel limits are shown when a channel passes through a fixed structure like a bridge • Color meanings for red, green, yellow, and white lights in lateral and special marks

💭 Think About

• Think about how you normally identify the left and right sides of a channel at night when approaching a bridge opening. • Ask yourself which color(s) are usually used for lateral channel edges versus which are used for special marks or warning signals. • Consider whether a vertical line of three white lights sounds more like a signal for safe passage/centerline or for channel edges.

✅ Before You Answer

• Verify how lateral marks (port and starboard sides of a channel) are colored in the U.S. system. • Check what yellow lights are typically used for (e.g., special purpose buoys, towing lights) and whether that matches "edges of a channel" on a bridge. • Consider whether three white lights in a vertical line would show both edges of a channel or more likely mark a single feature (like center or safe span).

Question 1 of 27070

When the navigational channel passes under a fixed bridge, the edges of the channel are marked on the bridge with what lights?

Red lights on the LDB and green lights on the RDB

Yellow lights

Red lights

Three white lights in a vertical line

Question 1 / 2707066636ee928f7522a1c519cc7

Question 1 of 2707066636ee928f7522a1c519cc7

When the navigational channel passes under a fixed bridge, the edges of the channel are marked on the bridge with what lights?

Back

Question 1 of 27070

When the navigational channel passes under a fixed bridge, the edges of the channel are marked on the bridge with what lights?