SIMO Depth dependent hydrodynamic coefficients 1. Input 2. Sketch Note zin is the value used to interpolate in the Zd-table ZCOEF is the location of zero on the cross section of the slender element ZCOEFF = 0 , default: starts at the free surface ZCOEFF = - depth : starts the sea bottom ξ is the wave elevation Zstrip is the distance from Zg to the center of the slender element 3. Default Zd ≥ 0 : above water < 0 : submerged