. "In this paper, tracking control of unmanned surface vessels by using the robust mode sliding control in the presence of
fixed and moving obstacles are investigated. The mathematical model of vessels is in three degree of freedom (3DOF)
and only contains the kinematics and dynamics of relevant to surge, sway and yaw. These vessels are controlled in
under actuated manner; although they have (3DOF), but only are equipped", Aerospace Mechanics, 13, 4, 2018, 11-19.