Design and Implementation of Distress Prevention System using a Beacon Imsu Lee, Kyeonhoon Kwak, Jeonghyun Lee, Sangwoong Kim, Daehan Son, Eunju Park and Hankyu Lim MATEC Web Conf., 76 (2016) 04024 Published online: 21 October 2016 DOI: 10.1051/matecconf/20167604024