When entering from seaward, what does a buoy...

When entering from seaward, what does a buoy...

Question 1 of 2707066636ee928f7522a1c5196bc

When entering from seaward, what does a buoy displaying a composite group (2+1) flashing red light indicate?

Question 1 of 27070

Q

When entering from seaward, what does a buoy displaying a composite group (2+1) flashing red light indicate?

🔍 Key Concepts

• IALA Region B lateral buoyage system used in the United States • Meaning of a composite group (2+1) flashing light on a lateral mark • Difference between a simple port/starboard lateral mark and a preferred channel (bifurcation) mark

💭 Think About

• First decide: in Region B, what color marks the starboard side of the main channel when returning from sea? How does that relate to a red light? • Ask yourself: does a composite group (2+1) light pattern normally mark an isolated danger/wreck, a sharp bend, or a junction where the channel splits? • Once you know it marks a junction, think: if the light is red, on which side would you keep that buoy when following the preferred channel while entering from seaward?

✅ Before You Answer

• Confirm that composite group (2+1) flashing is used specifically for preferred channel (bifurcation) marks, not for wrecks or sharp bends. • Verify in the IALA Region B system that red = starboard side when returning from sea ("red right returning"). • Check which answer choice clearly describes a junction with a preferred channel and matches what a red-light preferred channel mark would be telling you.