When it comes to building robots and vehicles for spying, many assume that traveling underwater is a better way to go undetected. Washington State University researchers have come up with a semi-submersible vehicle that travels in water undetected. It measures 1.5ft long, built with 3D printed parts.
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New 'semi-sub' shows spy potential of sailing at waterline
As you can see in the video, most of the body is submerged but has a small part above the water surface for communication.
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