Current Description The current velocity is normally assumed to be constant with time. A quasi-static analysis can, however, include the effect from a quasi-static current variation, and it is also possible to describe time-dependent current variation in dynamic analysis. The current velocity at a given position is described by speed and direction. This can be done by input of discrete values and interpolation to actual node positions, or by definition of standard profiles. The velocity components in global directions are denoted \[\boldsymbol{U}^\textrm{c}=[U^{c}_x,U^{c}_y,U^{c}_z]\] The vertical component \(\mathrm {U^{c}_z}\) is always assumed to be zero. Wave Potential Hydrodynamic Load Models for Submerged Elements