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Stemming the Tide Controlling Introductions of Nonindigenous Species by Ships' Ballast Water (1996) / Chapter Skim
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D ALTERNATIVE SHIP DESIGNS
Pages 106-108

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From page 106...
... would have dire commercial consequences and would not be a viable option for ship owners. The resulting shortages in worldwide shipping capacity would have a dire impact on world trade.
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From page 107...
... CLEANER BALLAST TANKS To assist in the complete removal of ballast water and sediment, the internal features of the ballast system structure could be designed to facilitate draining of ballast water to the ballast suction and stripping suctions. Horizontal, flat longitudinal surfaces could be fitted with drain holes located along their length and adjacent to vertical surfaces.
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From page 108...
... If ballast water loading were necessary in one port, the ballast could be retained on board until the next visit to that port. However, the inventory control requirements of such an operation, coupled with unpredictable cargo and weatherrelated ballast requirements, would probably render this approach impractical in most cases.
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Key Terms

  • water change
  • changing ballast
  • available options
  • ballast change
  • ship design

  • total ballast
  • ballast operations
  • cargo deployments
  • temporary ballast
  • container vessels

  • geographic separation
  • tanker hatches
  • nonindigenous species
  • water requirements
  • retained ballast

  • complete discharge
  • maintain ships
  • vessel trim
  • normal ballast
  • approach impractical

  • control requirements
  • incorporating permanent
  • ballast tanks
  • incorporate structural
  • horizontal surfaces

  • cargo requirements
  • controlling ballast
  • ventilation pipes
  • angling downwards
  • regulatory authority


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