The influence of long parallel pressure-ridge keels on the ice-water drag and the fluid velocity under ice in a rotating, non-stratified ocean is studied using a numerical model. Turbulence in the water is modeled by a two-equation eddy-viscosity model, designed for adverse pressure-gradient flow along both smooth and rough ice without assuming the logarithmic law-of-the-wall to be valid. The simulations show the violation of this law in flow beneath the ice keels. The numerical results demonstrate that the orientation of the ice keels relative to the ice-drift direction and the ice keel depth have a significant influence on the ice-water drag coefficient, the drag-turning angle, the near-ice velocity and the turbulence fields. Application to free-drifting, wind-driven sea ice yields changes in the deflection angle between the wind stress and ice-drift directions of about 40¿, depending on the pressure-ridge orientation relative to the drift direction. In addition, the results define a region where the ice-drift direction is sensitive to changes in the wind stress direction.