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Of course the lifeguard has extra context by just being in the same space with these people beforehand. They're probably already watching certain people more closely before the video starts while you and I enter the space cold (and through a fixed window).

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I wonder how people would feel about machine-learning enhanced lifeguard system. Machines are sharp all the time.

At least machines are consistently dull.

This is such a good idea there are several already on the market:

https://youtu.be/Gka9TFwqoVs?t=60 https://youtu.be/FTtHOZfV_qA?t=47 https://www.straitstimes.com/singapore/drowning-detection-sy... https://swimeye.com/

Almost certainly. Of the saves I made over the years, the only one where I wasn't already giving the victim extra attention for 5-10 minutes was a seizure.

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