In the North Sea area, you sight a buoy with...

Question 1 of 2707066636ee928f7522a1c519d0c

In the North Sea area, you sight a buoy with a quick light showing 3 flashes every 10 seconds. Which topmark in illustration D030NG below would be fitted to this buoy under the IALA Buoyage Systems?

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Question 1 of 27070

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In the North Sea area, you sight a buoy with a quick light showing 3 flashes every 10 seconds. Which topmark in illustration D030NG below would be fitted to this buoy under the IALA Buoyage Systems?

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🔍 Key Concepts

• Remember that the North Sea uses the IALA Region A buoyage system. • Quick light with 3 flashes every 10 seconds is a specific cardinal mark light characteristic. • Each cardinal mark (N, E, S, W) has a distinct topmark cone arrangement that matches its light group.

💭 Think About

• First, decide which cardinal direction (N, E, S, or W) is indicated by a quick light showing 3 flashes every 10 seconds. • Once you know the cardinal direction, recall how the two black cones are arranged for that specific cardinal mark. • Compare the theoretical cone arrangement for that cardinal mark with options A–D and eliminate the ones that don’t match.

✅ Before You Answer

• Verify from your IALA table which cardinal mark uses Q(3) 10s or VQ(3) 5s/10s as its light characteristic. • Double-check the orientation of the cone points (upwards, downwards, towards each other, or away from each other) for that same cardinal mark. • Make sure the option you choose shows two cones in the correct relative orientation for that cardinal direction, not just any pair of cones.