SONAR FOR OBTAINING A TOPOGRAPHIC REPRESENTATION OF AN UNDERWATER SURFACE AND THE UNDERLYING LAYERS

摘要

Sonar contained in fish towed in immersion by a vessel. /P P It comprises at least one transducer whose axis is oriented obliquely in a transverse plane of the fish and adapted to successively emit acoustic signals of different frequencies, and means for comparing the amplitude of the echoes of the pulses of different frequencies transmitted. /P P Application to the detection of the nature of an immersed surface.