Abstract: The HydroSTAR is a version of commercial hydrodynamic software which was developed by Bureau Veritas and seen as a tool suitable for the motion predictions of a wide range of floating structures in the waves.This pap er aims to discuss the adaptability of the software to the seakeeping performance prediction of USS Enterprise(CVN 65).The calculation results derived from HydroSTAR were compared to that of the strip method.The auth hor also calculated the significant value of hull motion utilizing P-M spectrum and compared the relevant value with recognized statistic value.Through analysis,it verified that the motion response of the carrier could well reflect the actual seakeeping performance,which is capable of evaluating seakeeping performance of aircraft carrier.