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NAL Agricultural Thesaurus
U.S. Department of Agriculture

Concept Breadcrumbs

Research, Technology, Methods > equipment > measuring devices > sonar
Preferred Term:

sonar

Definition:
A method or system, analogous to radar used under water, in which high frequency sound waves are emitted so as to be reflected back from objects, and used to detect the objects of interest. Called ASDIC by the British. (From SOund, NAvigation, and Ranging).
Concept Schemes:
NALT Full
Broader Concept:
measuring devices
Related Concepts:
Entry Terms:
  • sound navigation and ranging
URI:
https://lod.nal.usda.gov/nalt/332136
Download this Concept:
RDF/XMLCreated 2019-07-09, last modified 2019-11-25