1. Department of Defense System Engineering, Sejong University, Seoul, 05006, Korea ychoo@sejong.ac.kr
2. Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093-0238, USA hcsong@ucsd.edu
3. Department of Naval Architecture and Ocean Engineering and Research Institute of Marine System Engineering, Seoul National University, Seoul, 08826, Korea wseong@snu.ac.kr