Trial of a New, Split-beam Echo Sounder
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Original versionThis report is not to be cited without prior reference to the authors
The first at-sea trial of a new, split-beam echo sounder, the SIMRAD ES380 system, is described following a review of the split-beam principle, outline of its realization in hardware and software, and description of adaptation of the commercial model for research purposes. Actual uses of the system during a cruise about Lofoten in March 1984 are described. These include direct in situ measurement of single-fish target strengths for several species, and investigation of avoidance reactions of fish under observation. Some planned features of the system are listed.