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The rip current warning index function, which estimates the likelihood of dangerous rip current in the real-time rip current warning system operating to help mitigate against rip current accidents at Haeundae beach, was studied. The rip current warning index evaluated as a function of various real-time observations was developed based on Choi et al. (2013b). This study shows a versio n of rip current warning index improved by including the effect of wave direction and spreadings of frequency-directional spectrum on rip current likelihood. The wave and tidal observations in 2012 at Haeundae coast were applied to the rip current index function, a nd its performances at several real events found based on CCTV images were presented and analyzed.Key words : Likelihood of rip current, Warning-index function, Real-time observation, Numerical simulation, Haeundae beach                     .           Choi et al. (2013b)    .               . 2012           , CCTV             . :   ,  ,  , ,

Study of Rip Current Warning Index Function according to Real-time Observations at Haeundae Beach in 2012