Acoustic-hydrophysical experiments in the coastal zone of the Korean Peninsula

This paper presents the results of a pilot experiment on determination of the possibility for effective application of the navigational systems of autonomous robots and remote tools of water structure and dynamics monitoring in shallow water areas. The experiment was based on investigation of the regularities of formation and interaction between hydroacoustic and hydrophysical fields when sounded by complex phase-shift keyed signals with the central frequency of 2500 Hz. The possibility of monitoring of temperature and current fields by acoustic tomography methods in the water area of several square kilometers in size and no more than 10 m in depth, at depth changes up to several meters due to tidal effects, was studied. Additionally, the possibility and precision of solution of navigational problems for underwater objects at such shallow depths was studied. For this purpose a hardware-software complex, equipped with two sources of navigational signals and an imitator of the submersible receiver path, was used.