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How to survive beach rip currents? - YouTube
https://www.youtube.com/watch?v=-hCZuYzNujI
Please watch: "UNSWTV: Entertaining your curiosity" https://www.youtube.com/watch?v=bQ7UO8nxiL0 -~-~~-~~~-~~-~- Science of the Surf Playlist: https://www.you...