#3119: Flettner Rotor

XKCD comic, described below.
Transcript

[A panel showing Cueball standing on a Flettner Rotor Sailboat, which is decorated with rocks and a lighthouse-top on the Flettner Rotor.]

[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)

"And in maritime news, the Coast Guard is on the scene today after an apparent collision between two lighthouses."

ExplainOriginal