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by kuhewa 1278 days ago
A jellyfish is a parachute that can pulse a little
1 comments

Imagine a dragon like sail for water streams, it runs below the surface in the stream, and allows you to milk the potential energy of the water toward a direction change for your boat..

https://en.wikipedia.org/wiki/Sailing_into_the_wind

But with the gulf stream and automated underwater dragging dragons