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Shark-detecting drones 可探测鲨鱼的无人机 本集内容 Shark-detecting drones 可探测鲨鱼的无人机 学习要点 有关“Danger 危险”的词汇 边看边答 How does the drone know if it's spotted a swimmer or a shark? A shadow in the sea or something more sinister? From the beach it's hard to tell but from the skies the drone has a clearer view. It feeds into deep learning software which it's claimed has a 92% success rate in spotting sharks, as well as less threatening species. Every time it sees a dolphin, whale or a swimmer in distress it learns their shape. Launched along the beaches of New South Wales the drones can patrol for 40 minutes. Daniel was one of the first to train as a lifesaver pilot. Daniel Trollope, Drone pilot I mean, I can't physically run out and grab a board and paddle out and save someone, but sitting on the beach we’ve got eyes in the sky and we're just another layer of protection, really. The drones don’t only observe - they can react too, dropping an inflatable device to help people in the sea. It won't replace the use of controversial shark nets and drum lines however – which some claim do more harm than good. The drones won't be on every beach every day, but they should give everyone a better understanding of what’s down below. 仅仅是一个影子？或是一个更危险的生物？ | 
