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Echo Sounding

Naturevolume 115pages689690 (1925) | Download Citation

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Abstract

THE extent of the interest which has been excited 1 in foreign navies by the proved rapidity and accuracy of soundings obtained by the method of echo depth sounding is indicated by contributions to the latest number of the Hydrographic Review1 “Sonic” echo methods, in which the compressional waves sent out from the underwater transmitter are of audible frequencies, are dealt with in part of an article which contains a summary of the results obtained by previous writers in this field, and in an article by Dr. H. C. Hayes, Research Physicist of the U.S. Navy, in which is set forth the theory of three different methods of obtaining depths by sonic echoes. These methods have been described elsewhere and the principles are now well known. Apart from what is known as the “angle method,” which is most appropriate to shallow depths, all sonic echo methods reduce to artifices for indicating in a simple and trustworthy manner the interval of time which elapses between making an underwater signal and the return of the echo from the bottom, and methods of avoiding disturbances in the receiving apparatus due to the original signal. A simple device, produced by the Scientific Research Department of the British Admiralty, achieves these objects and has already been described in these columns.2

References

  1. 1

    Hydrographic Review, vol. 2, No. 1, Nov. 1924, pp. 51–121.

  2. 2

    NATURE, March 29, 1924, pp. 463–65.

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DOI

https://doi.org/10.1038/115689a0

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