Real-world recognition

Read the photograph, not the diagram

Clean drawings teach the system. These twelve licensed photographs test whether you can still find the signal in weather, darkness, rigging and shore clutter.

Photo recognition

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Red port-hand lateral buoy 136 among ice on the River Elbe, with a busy residential shoreline behind it. — Photo: Astielau · CC BY-SA 4.0

In IALA Region A, what does the red buoy in this cluttered scene mark?