Abstract: Paper presents method of Continuous Wavelet Transform (CWT) used in process of hydroacoustics signals analysis. The continuous wavelet transform can be used to produce spectrograms which show the frequency content of signals as a function of time. Such representation is very useful during analysis of non-stationary signals which can be acquired during passive measurements of hydroacoustics field of moving ships. In paper there is described the continuous wavelet transform analysis method by presenting the mathematical background of CWT and its properties. At the end some examples of hydroacoustics signals analysis and its brief descriptions was shown.