Lots of pools have such systems, e.g. <a href="https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Poseidon_drowning_detection_system" rel="nofollow">https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Poseidon_drowning_detection_...</a><p>It&#x27;s a straightforward but very meaningful application of computer vision.