THE EFFECT OF HULL PROPORTIONS ON IMCO TANKER SEGREGATED BALLAST REQUIREMENTS
The minimum quantity of segregated water ballast that a tanker must carry under the IMCO Regulation is based on a specific ballast condition draft and trim which are directly related to the vessel's length. Unfortunately, the above segregated ballast criteria cannot easily be converted into a function of capacity or deadweight. With this in mind a series of diagrams is presented to assist the designer to determine the amount of ballast required and to select hull proportions that will result in minimum ballast requirements for a given vessel deadweight. It is shown that for a 250,000 tonne DWT Crude Oil Tanker a 13 percent reduction in required segregated ballast results when the L/B ratio is reduced from 6 to 4.5. Low L/B ratios have been proposed for shallow draft vessels, but it is shown that from the point of view of minimum segregated ballast a low L/B ratio with deep draft is best.
- Paper presented at SNAME (Gulf Section) Spring Meeting and Star Symposium: Merchant & Naval Design, The Past in Review The Future in Forecast, Houston, April 25-28, 1979.
Society of Naval Architects and Marine Engineers601 Pavonia Avenue
Jersey City, NJ USA 07306-2907
- Lamb, T
- Publication Date: 1979
- Features: References;
- Pagination: 9 p.
- TRT Terms: Ballast (Ships); Design; Economic analysis; Hulls; Oil tankers; Pollution; Pollution control; Regulations; Tankers; Vehicle design; Water quality management
- Identifier Terms: International Maritime Consultative organization
- Uncontrolled Terms: Ship design
- Old TRIS Terms: Hull forms; Imco pollution regulations; Segregated ballast tankers; Tanker ballasting; Tanker pollution prevention; Water pollution prevention
- Subject Areas: Design; Economics; Environment; Law; Marine Transportation;
- Accession Number: 00189644
- Record Type: Publication
- Source Agency: Society of Naval Architects and Marine Engineers
- Files: TRIS
- Created Date: Apr 25 1979 12:00AM