A possibility of extending the time between overhauls period of a compressor unit on a ship from the Seismic Industry by using pre-synthesized predictive mathematical models is considered. These mathematical models were created by processing experimental data and refer to cases of before and after overhaul of the Seismic compressor. In the second part, results from the synthesis of predictive mathematical models of the three piston stages of the Seismic compressor are proposed.