Any experiment performed with the use of receiving hydroacoustic antenna arrays requires solving the important problem of determining their various characteristics after array deployment.

Transfer coefficients of array hydrophones, that relate acoustic pressure at the hydrophone input with voltage at the output, are an example of such characteristics. After array deployment, these coefficients may differ considerably from the values measured under laboratory conditions (before array deployment). The problem of measurement of transfer coefficients of low-frequency arrays after array deployment has not been fully investigated. In the case of arrays with flexible or semi-rigid deployment, solution of the important problem of determining their profile in horizontal or vertical planes is needed. Besides for many applications in is necessary to estimate bottom parameters in the region of array deployment must be performed.

To solve the problems mentioned, a complex method was developed. This method uses a source of tonal acoustic signal with changing frequency and a precise hydrophone with a known transfer coefficient. It is assumed that the transfer coefficients of array hydrophones are not considerably dependent on frequency, the source is monopole (its radiation level is the same in various directions) and the precise hydrophone has a uniform spatial beam pattern. The realization of the proposed method also enables to determine whether a multibeam substance model is suitable under natural conditions. In this model, an acoustic signal from a source of tonal signal is modeled as the sum of the direct signal and multiple reflections at the surface and bottom.