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- Q212 - Navigation General: Oceans
177. In the North Sea area, you sight a buoy showing a quick white light showing 6 flashes followed by one long flash at 15 second intervals. Which of the four topmarks in illustration D031NG below would be fitted to this buoy?
The buoy's light characteristic Q (6)+LFl.15s identifies it as a South Cardinal mark, which is distinguished by a topmark of two black cones pointing downward, as shown in option C.
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