Esteban San Román, SegundoRecas Piorno, JoaquínGirón Sierra, José MaríaCruz García, Jesús Manuel de laRiola, J. M.2023-06-202023-06-202005[l] J.M. Giron-Sierra, S. Esteban, B. De Andres, J.M. Diu and J.M. Riola, “Experimental study of controlled flaps and T-foil for comfort improvement of a fast ferry,” in Proceedings IFAC btl. Coni Control Applications in Marine Systems CAM200I, GIasgow, 2001. [2] J.M. De la Cruz, J. Aranda, J.M. Guon-Sierra, F. Velasco, S. Esteban, J.M. Diaz, and B. De Andres,”Improving the comfort of a fast ferry with the control of flaps and T-foil,” IEEE Control Systems Magazine, vol. 24, n. 2, pp. 47 60, April 2004. [3] T.J. Fossen, Marine Control Systems, Marine Cybernetics, AS, 2002.0-7803-9103-9https://hdl.handle.net/20.500.14352/53341©2005 IEEE. The authors would like to thank the Spanish MCYT, “Ministerio de Ciencia y Tecnologla”, for their support (project DPI200038~CO3-02), the CEHPAR staff for their cooperation,and IZAR for its recommendations. Oceans 2005 Europe International Conference(jun 20-23, 2005. Brest, France)A second part of our research on the seakeeping control in fast ferries, is devoted to general heading and sea state conditions. Although scaled ships are basis for experimental studies, it is not possible to keep using them in towing tanks. The main reason is that high speeds require large space for experiments, so towing tanks are not large enough. This has been noticed after the first part of our research, with head seas, in a 150m x 30m towing tank with wavemaker. Consequently, we are preparing for open air experiments. A new fast autonomous scaled ship has been developed. She is self-propelled, and is self-governed by an embedded PC on-board. The ship carries sensors for heading, speed and seakeeping control. Several scaled moving appendages have been added: two transom flaps, two lateral fins, and a T-foil. The ship uses two scaled waterjets, which also control the heading: the ship has no rudder. A distributed monitoring and control system has been designed and implemented for on-board operation. All equipment has to be very light, since the real fast ferry that we reproduce at 1/40 scale is aluminium made. A digital radio link has been provided for distant off-shore monitoring. The paper describes the autonomous ship, the on-board monitoring and control system, and shows several experimental results with quiet waters and with several types of waves.engbook parthttp://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1513235http://ieeexplore.ieee.orgopen access004AcousticsEngineering OceanInstruments & InstrumentationImaging Science & Photographic TechnologyInformática (Informática)1203.17 Informática