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Another drone gets posted on this board. Guess it's the vibe of the times. Northrups Manta Ray, a gliding UUV drone that mimics it's name sake. Also has a novel system to extract energy from thermal gradients in the ocean

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With a shape like that and no folks on board, I'm expecting the second generation to be a flying sub, like that from Voyage to the Bottom of the Sea. It really is one of the coolest SF designs.

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Despite it not flying the sub is worth reading about.

[URL unfurl="true"]https://www.twz.com/sea/manta-ray-extreme-endurance-underwater-drone-unveiled?utm_source=spotim&utm_medium=spotim_recirculation&spot_im_redirect_source=pitc[/URL]