Free Running Manouvering Test Device; is a ship hydrodynamics test system. Free Running Manouvering Test Device helps gathering technical details of ship maneuvering characteristics such as turning circle, zig-zag, etc. by using scaled models of surface ships. Model of the ship, including propellers and drive train can be manufactured and control units of Free Running Device can be assembled into model. A Real Time Kinetic (RTK) GPS system aided by IMU allows to get accurate position and heading data including roll and pitch. RPM and rudder positions gathered by servo motor encoders. These technical details are crucial for validating the manouvering performance of designs and to control autonomous vehicles. These data is input for mathematical functions of weapon control, dynamic positioning and autopilot systems of ships and also used for simulator systems in order to train personnel.