Approved for public release; distribution unlimited. / A ship in steering is considered as a physical mechanism that is forced by a rudder movement to produce a response. Emphasis is laid upon the relation between the forcing and the response, leaving aside any detailed consideration of the forces concerned. Course-Keeping with Automatic Control techniques is studied following this concept. Computer programs are developed to simulate different conditions. Interpretation of the results is made to evaluate the different methods used. / http://archive.org/details/coursekeepingwit00agua / Lieutenant Commander, Peruvian Navy