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At Werri Beach today this large shark was approaching a surfer, and I used my drone’s speaker system to warn him. Watch him look up at the drone, then bolt, with the sudden splashing warding off the approaching shark @smh @FinancialReview pic.twitter.com/awjDHMoUVq

— christopher joye (@cjoye) September 15, 2019

澳洲一位无人机玩家日前在东岸捕捉到一条鲨鱼靠近冲浪者，于是利用安装在无人机上的扩音器发出警告，避免一场可能的鲨鱼攻击事件。

澳洲东岸新南威尔斯伊拉瓦拉海滩，有一名冲浪者悠闲的在海上等浪，殊不知水下一个黑影正游向他。所幸无人机玩家乔伊(Christopher Joye)刚好在这一带放飞无人机，眼尖看出这个黑影的真面目是一头鲨鱼，马上向冲浪者发出警告。

视频可见，听到警告的冲浪者，快速掉头往岸上滑去，而水中的鲨鱼也受到惊扰，转身往深海游去，避免了一场可能的攻击事件。

乔伊认为，利用无人机来当作警告系统比使用鲨鱼网来得有效，他在闲暇时会自主巡逻海滩，用他配有红外线热成像和警告系统的无人机，来保护游泳和冲浪民众的安全。