00000nam 2200000zi 4500 9.936179 CaOODSP 20241007095055 m o d f cr |n||||||||| 240328e198912uubccad obt f000 0 eng d CaOODSP eng rda CaOODSP n-cn-bc DR52-11/7-1989E-PDF Preston, Jonathan M., author. Stability of towfish as sonar platforms and benefits of the two-part tow / J.M. Preston. [Victoria, B.C.] : Defence Research Establishment Pacific [= Centre de recherches pour la défense pacifique] : [Research and Development Branch, Department of National Defence], December 1989 1 online resource (v, 38, [5] pages) : illustrations, charts text txt rdacontent computer c rdamedia online resource cr rdacarrier DREP Technical memorandum ; 89-19 Digitized edition from print [produced by Defence Research and Development Canada]. Includes bibliographical references (page 33). "Stability is a very important characteristic of the vessel or body on which a sonar is mounted. With normal tow configurations, stability requirements are often not met by a towfish in moderate sea states, particularly with short cable lengths. The trial described here demonstrates that the two-part tow, which uses a down weight and a neutrally buoyant towfish, significantly reduces towfish motion. In particular the two-part tow effectively suppressed pitch and accelerations. However towfish yaw, which was shown to be caused by lateral motions of the ship's stern, was still significant, and yaw is particularly important to sonar image quality."--abstract (page iii). Remote submersibles British Columbia Design and construction. Sidescan sonar. Robots sous-marins Colombie-Britannique Conception et construction. Sonar latéral. Technical reports lcgft Rapports techniques rvmgf Defence Research Establishment Pacific, issuing body. Canada. Department of National Defence. Research and Development Branch, issuing body. Technical memorandum (Defence Research Establishment Pacific) 89-19. (CaOODSP)9.936067 PDF 1.77 MB https://publications.gc.ca/collections/collection_2024/rddc-drdc/DR52-11-7-1989-eng.pdf DREP-TM-89-19