The invention relates to a system for underwater exploration using a submerged device (1) towed by a surface vessel, the submerged device (1) being connected to the vessel by a towing line (2) and comprising equipment supplied by the electricity, characterized in that the submerged device (1) comprises at least one device for the local production of electrical energy, said device being an electric hydrogenator (6) and in that the towing line (2) has no electrical supply cable connecting the vessel to the submerged device (1).
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