Fig. 3From: Dimension reduction in heterogeneous parametric spaces with application to naval engineering shape design problemsA sketch illutrating the hull-attached frame \({\widehat{xyz}}\) in red and the global reference frame \({\widehat{XYZ}}\) which is moving with the constant horizontal velocity of the boat. The ship here depicted is experiencing a vertical displacement s and an angular displacement characterized by the pitch angle \(\phi \)Back to article page