High-speed craft (HSC) occupants are subjected to a harsh environment due to repeated shock loading which results in serious potential for injury to the occupants. In order to study the shock mitigating effectiveness of developed HSC suspension seats, it is important that these seats be studied and characterized in the laboratory by reproducing the HSC impact profiles. Simulations were performed to understand the effect of system parameters of the drop tower to obtain the HSC impact profiles. Next, the ER dampers were characterized at high velocities which involved dynamic testing using a drop tower apparatus and identifying the parameters of a Bingham plastic model to represent the characteristics of the damper. The characterization results were analyzed in order to assess the potential of using the ER dampers to replicate impact profiles of HSC.