If you re a frustrated pathetic piscator who couldn't catch a dogfish with dynamite, unpack your waders. The folks at Powervision (www.powervision.me/en) - a provider of UAV technologies - have introduced PowerRay: an underwater drone that can dive up to 30 m (98 ft) and swim around while recording 4K video. Video signals are streamed to your phone, which is used for navigation and spotting fish at 720/1080 resolution.
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