Thor I. Fossen is a naval architect and a cyberneticist. He received an MSc degree in Marine Technology in 1987 and a PhD degree in Engineering Cybernetics in 1991 both from the Norwegian University of Science and Technology (NTNU), Trondheim. He is currently a professor of guidance, navigation, and control and co-director of the NTNU Centre for Autonomous Marine Operations and Systems. Fossen’s expertise covers guidance systems, inertial navigation systems, nonlinear control and observer theory, vehicle dynamics, hydrodynamics, autopilots, and unmanned vehicles. He has authored six textbooks. Fossen is one of the co-founders and former Vice President R&D of the company Marine Cybernetics AS, which was acquired by DNV in 2012. He is also co-founder of SCOUT Drone Inspection AS (2017). He received the Automatica Prize Paper Award in 2002 and the Arch T. Colwell Merit Award in 2008 at the SAE World Congress. He has been elected to the Norwegian Academy of Technological Sciences (1998) and elevated to IEEE Fellow (2016).