Detecting submerged bodies: controlled research using side-scan sonar to detect submerged proxy cadavers.

Autor: Healy CA; Department of Anthropology, University of Arkansas, Old Main 330, Fayetteville, AR., Schultz JJ, Parker K, Lowers B
Jazyk: angličtina
Zdroj: Journal of forensic sciences [J Forensic Sci] 2015 May; Vol. 60 (3), pp. 743-52. Date of Electronic Publication: 2015 Feb 13.
DOI: 10.1111/1556-4029.12671
Abstrakt: Forensic investigators routinely deploy side-scan sonar for submerged body searches. This study adds to the limited body of literature by undertaking a controlled project to understand how variables affect detection of submerged bodies using side-scan sonar. Research consisted of two phases using small and medium-sized pig (Sus scrofa) carcasses as proxies for human bodies to investigate the effects of terrain, body size, frequency, swath width, and state of decomposition. Results demonstrated that a clear, flat, sandy pond floor terrain was optimal for detection of the target as irregular terrain and/or vegetation are major limitations that can obscure the target. A higher frequency towfish was preferred for small bodies, and a 20 m swath width allowed greater visibility and easier maneuverability of the boat in this environment. Also, the medium-sized carcasses were discernable throughout the 81-day study period, indicating that it is possible to detect bodies undergoing decomposition with side-scan sonar.
(© 2015 American Academy of Forensic Sciences.)
Databáze: MEDLINE
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