A ONE-YEAR COLLECTION OF LONG-RANGE ECHO RECORDS OF FISH BEHAVIOR

Abstract

Echo-ranging records have been obtained at Perranporth over a period of about one year, some being continuous over several days. Broadly speaking there are three types of trace, all of them at least partly biological in origin: wrigglers, fixed bottom echoes and diffuse patterns. Fish behaviour is displayed continuously out to 40 miles, and is especially complex near dawn and dusk.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1964
Accession Number
AD0361142

Entities

People

  • D. E. Weston
  • G. Wearden
  • J. Revie

Organizations

  • Admiralty Research Laboratory

Tags

Communities of Interest

  • Autonomy
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Acoustic Attenuation
  • Detection
  • Diurnal Variations
  • Echo Ranging
  • Echoes
  • False Targets
  • Frequency
  • Frequency Diversity
  • Government Procurement
  • Governments
  • Law
  • National Security
  • Range Finding
  • Submarine Detection
  • Targets
  • Technical Information Centers
  • United States

Readers

  • Acoustical Oceanography.
  • Oceanography.
  • Theoretical Analysis.