#3119: Flettner Rotor
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[A panel showing Cueball standing on a decorated Flettner Rotor Sailboat]
Text beneath panel: Sailing tip: If you have a Flettner Rotor Sailboat, you can add some fake plastic rocks and a light to make other boats give you the right of way.
(Sourced from explainxkcd.com)
Title text:"And in maritime news, the Coast Guard is on the scene today after an apparent collision between two lighthouses."