Under the IALA-A Buoyage System, when...

Question 1 of 27070673956e598d45f16831b6d81

Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which topmark shown in illustration D046NG below?

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Question 1 of 27070

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Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which topmark shown in illustration D046NG below?

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🔍 Key Concepts

• IALA-A lateral system: Which color and shape marks the port-hand side when entering from seaward? • Difference between conical (nun) and cylindrical (can) shapes and their corresponding sides of the channel. • How color + shape together identify port vs starboard marks in IALA-A.

💭 Think About

• First decide: in IALA-A, when you come in from seaward, what color do you keep to port? What color to starboard? • Next, match the correct side of channel to the proper topmark shape: which side uses conical, which uses cylindrical? • Then look at the four illustrations and see which option’s shape and color combination fits a buoy that you should leave to port when entering from seaward under IALA-A.

✅ Before You Answer

• Verify which color is used for port-hand lateral marks in the IALA-A region when entering from seaward. • Confirm which topmark shape (cone vs cylinder) corresponds to port-hand vs starboard-hand buoys. • Check that your chosen option shows both the correct color and the correct shape for a buoy that should be left to port.