High-Frequency Acoustic Scattering and Absorption Effects with Ship Wakes

Effets de la Dispersion Acoustique Haute Fréquence et de l'Absorption dans les Sillages de Navire

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Authors
  1. Trevorrow, M.V.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);TTCP Group MAR (Maritime Systems Group);TTCP Group MAR, Technical Panel TP-9 (Sonar Technology)
Abstract
Clouds of small air-bubbles injected and mixed into the near-surface ocean within vessel wakes can create significant acoustic scattering and extinction. Recent high frequency (100 kHz) sidescan sonar measurements on a moving vessel showed persistent strong backscatter features and significant dropouts in sea-surface reverberation behind the wakes. Details of the sonar measurements and features of ship wakes recorded during these sonar trials are reviewed. Estimates of typical wake width, persistence, backscatter strength, and effective extinction are presented for the case of straight-running and turning vessels at speeds up to 20 knots.

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Keywords
ship wake
Report Number
DRDC-ATLANTIC-SL-2005-125 — Scientific Literature
Date of publication
22 Aug 2005
Number of Pages
8
DSTKIM No
CA026399
CANDIS No
524260
Format(s):
Electronic Document(PDF)

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