Abstract: According to the characteristic of T/R-R bistatic sonar, the localization algorithm based on weighted least squares (WLS) estimate is proposed. Through numerical simulation, the performance of the proposed method is investigated for different baseline length. The Geometrical Dilution of Precision (GDOP) for bistatic sonar is given. The simulating results show that the location accuracy of WLS algorithm is higher than time only localization (TOL) methods for bistatic sonar.