The Intergovernmental Maritime Consultative Organization in 1973 proposed requirements for segregated ballast in an effort to eliminate pollution originated by ballast operations of tankers and possibly to reduce pollution caused by tanker accidents. The most cost-effective application of these pollution abatement measures for tankers is the subject of this paper. An existing very large crude carrier (VLCC) was used as the base ship for the studies on which the paper is based. An optimization procedure for the distribution of segregated ballast within the cargo box for three basic concepts is outlined in the first part of the paper; the determination of an optimum construction concept is described in the second. The optimum concept is derived from a comparison of ship economics. An economic evaluation for the conversion of the existing VLCC by modifying overall dimensions is presented in the third part. Also, a brief study of the economics for jumboizing the final tankers is included in Appendix 2. The purpose of the paper is to enhance capital savings with the utilization of cost-effective tank arrangements for conversions and new constructions, as proposed in Part 1. The economic studies of Parts 2 and 3 should assist an owner in his decision as to which construction concept to employ for a major conversion of an existing vessel or for a new vessel.

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  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Authors:
    • Czimmek, D W
    • Jordan, C R
  • Publication Date: 1981-4

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Filing Info

  • Accession Number: 00331660
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 12 1981 12:00AM