Nak Yong Ko received his B.S., M.S., and Ph.D. degrees in the Department of Control and Instrumentation Engineering from Seoul National University, Seoul, Korea, in 1985, 1987, and 1993. His major research areas include navigation, collision avoidance, and motion planning in robotics. He has been with the Department of Electronic Engineering, Chosun University, Gwangju, Korea, since 1992 as a professor. He is involved in projects developing unmanned aerial vehicles and underwater vehicles, especially in the development of navigation algorithms. He worked as a visiting research scientist at the Robotics Institute, Carnegie Mellon University, Pittsburgh, PA, USA, for the years 1997-1998 and 2004-2005.