“…In [9,10,1,2,3,4,5] the need of GEMs in robotics is advocated. In marine robotics the practical possibility of guaranteeing the desirable reproducibility of results is limited by logistic and environmental constraints [5,15]. The experiments are greatly influenced by environmental constraints, such as waves, wind, sea currents, and by other external disturbances, such as other vehicles, that unavoidably limit the degree of reproducibility of experiments at sea.…”