Brass II - Bottom Reflection Active Sonar System Model II

Abstract

BRASS II utilizes a horizontally trained, vertically steered transducer which operates at 4300 cycles per second and is capable of placing in excess of 70,000 watts of acoustical power into the water. This power is equivalent to a source index level of 145 db//(mubar) exp 2 at 1 yard, on the axis of the main lobe. The transducer is driven by a transmitter which uses a hydrogen thyratron inverter as the power stage and is capable of delivering more thon 100,000 watts of pulsed electrical power. The complete BRASS ll system, with the exception of the motor generators, was installed on the USS-BLENNY (SS 324) in April 1959.The results of tests conducted in the latter part of 1959 are presented. These tests include echo ranging against submarine targets, measured values of bottom reflection loss for various ocean areas, and the limitations imposed by reverberation. The results reveal that bottom-bounce echo ranging represents real break-through in the field of sonar.

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Document Details

Document Type
Technical Report
Publication Date
Aug 24, 1960
Accession Number
AD1135109

Entities

People

  • Hugo J. Jr Wilms

Organizations

  • Navy Underwater Sound Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Active Sonar
  • Bottom Bounce
  • Deep Oceans
  • Detection
  • Echo Ranging
  • Echoes
  • Energy Storage
  • Generators
  • Hydrogen
  • Motor Generators
  • Oceans
  • Physics Laboratories
  • Power Supplies
  • Range Finding
  • Sonar
  • Target Echoes
  • Transducers

Readers

  • Acoustical Oceanography.
  • Electronics Engineering
  • Phased Array Antenna Design.