BOTTOL LOSS AND RELATED PHENOMENA IN THE TONGUE OF THE OCEAN,

Abstract

A series of acoustic tests was made in the Tongue of the Ocean. Eleven runs were made along 5 tracks, although individual runs did not, in all cases, cover a complete track. Two ships were involved in the operation. One towed a hydrophone at a speed of 4 knots. The second followed at various ranges dropping explosives. The primary purpose of these tests was to obtain bottom loss data at grazing angles of 30, 45, and 60 degrees. Data obtained are discussed and compared with other reported data. There is con siderable evidence that the bottom is layered and that the main energy in the bottom return is not from the water-bottom interface but from within the bottom itself. This is not an uncom mon occurrence and is referred to in the litera ture. Over a large part of the area surveyed, the bottom appeared to be acting more as a scatterer than a specular reflector. In some instances the scattering characteristics of the bottom changed markedly in short distances (2,000 feet or less). (Author

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1963
Accession Number
AD0413455

Entities

People

  • R. Halvorsen

Tags

Communities of Interest

  • Counter IED
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Bottom Loss
  • Explosives
  • Grazing
  • Grazing Angles
  • Hydrophones
  • Losses
  • Low Angles
  • Oceans
  • Reflectors
  • Scattering
  • Tongue Of The Ocean

Readers

  • Acoustical Oceanography.
  • Oceanography.
  • Theoretical Analysis.