The system included an Eg&G, Sparker array equipped with three electrodes and charged with 1 kJ power, a GeoResource©streamer with 8 hydrophones and a deck cable. The analog signal was firstly filtered by a Kron_Hite analogues filters in the 100-200 Hz and then sampled into a A/D board. Due to the average sea conditions and in order to save time for the MB acquisition the sparker profiles were acquired only in a few instances over the top of the Seine smt with the following acquisition parameters: shot interval: 1 sec., recording time 1 sec. Sample rate: 0,25 msec. Onboard data processing and rendering from SEGY files to interpretable seismic sections was achieved through SeisPro©software (L. Gasperini, ISMAR-CNR, Bologna, Italy).