There is interest in the potential for reducing tank vessel Collisions, Rammings and Groundings (CRG) casualties by improving the inherent controllability of the vessel. This paper reports on studies conducted for the Maritime Administration in which various concepts for improving the controllability of tank vessels were investigated. A detailed study of U.S. Coast Guard tanker CRG Casualty data and reports covering a five-year period was carried out to determine typical casualty situations and to make an initial assessment of the potential effects of improved controllability. From this effort, various measures of controllability were identified. In order to determine the performance of various concepts, studies with a baseline ship of about 84,000 DWT were carried out. The matehmatical models used were based on model tests and/or analysis of information in the literature. The concepts investigated included a conventional single propeller/rudder configuration as a baseline and modifications to this baseline including twin propeller/rudders, increased astern power, thrusters, high lift rudders and thrust vectoring devices. The maneuvering performance was determined from evaluation maneuvers in shallow water including turns, accelerating turns, coasting turns and stops. Some of the high lift rudder and thrust vectoring devices were identified as having significant benefits. Suggestions for future efforts are presented.

  • Supplemental Notes:
    • Presented at a meeting of the Chesapeake Section of SNAME, February 1981.
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Publication Date: 1981-2

Media Info

  • Pagination: n.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00329790
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 12 1981 12:00AM