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Tanker Spills Prevention by Design (1991) / Chapter Skim
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Appendix D: 35,000 DWT Tanker Cargo Capacity and Damage Stability Study
Pages 218-225

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From page 218...
... Principal dimensions of the generic design are as follows: LBP = 638' B = 89' D = 46.75' t = Varies based upon cargo carrying capacity NOTE: Most parametric studies of alternate tanker designs deal with VLCC-size tankers. Yet, much of the tanker traffic of interest to the United States is and will continue to consist of smaller tankers.
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From page 219...
... The ballast capacity must be sufficient to allow the vessel to meet ballast draft and maximum trim requirements. The ballast must be arranged in wing or double bottom tanks to minimize cargo outflow in the event of damage to the hull.
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From page 220...
... CARGOI CARGO I CARGO P 1 ~ APPENDIX D r 6.56 cat BALLAsTi BALLAST \ P 1 C 1 1 i BALLAST 1 r 17~ r FIGURE D-3 35,000 DWT tanker with B/S double bottom. BASEST— a 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ~ CARGO ~ CARGO ~ ~ 1 P 1 S 1 1 1 1 1 1 1 1 1 1 1 1 1 i: FIGURE D-4 35,000 DWT tanker with 2 meter (B/15)
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From page 221...
... The arrangements with double sides, bottom and hull exceed the area requirements. The 2 meter double bottom, sides and hull arrangements require additional ballast capacity to meet the draft and trim requirements.
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From page 222...
... The double hull, bottom or side arrangements meet MARPOL draft and trim requirements but were not optimized; therefore, internal tanks had to be used for ballast. Damage Stability The damage stability analysis was performed with the vessels fully loaded with cargo at a density of 6.63 BBL/LT (Bunker C)
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From page 223...
... The B/S double side and double hull have excessive heel and a reduced range of stability. The B/S double bottom arrangement results in the worst damage stability characteristics.
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From page 224...
... 224 CL C: z CC o cr: o o J 1 ILL y z A: o o o CO ':a42 ' ' ' '2 a_ o _ ~ ~ O o O o ~ o O ~ o O o o O O o O O O O O
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Key Terms

  • dwt tanker
  • double hull
  • single skin
  • damage stability
  • skin design

  • carrying capacity
  • meter double
  • cargo carrying
  • trim requirements
  • stability characteristics

  • ballast capacity
  • equilibrium heel
  • wing tanks
  • hull arrangements
  • cargo capacity

  • heel angle
  • double bottoms
  • compartment damage
  • cargo outflow
  • meet ballast

  • similar cargo
  • hull loses
  • meet damage
  • worst damage
  • bottom arrangement

  • hull arrangement
  • maximum trim
  • arrangements meet
  • bottom loses
  • righting lever


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