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Technical Discussions
Columbi Egg Tanker Operation MarineTalk Discussion Forums
All dates are given in mm/dd/yyyy format. Technical Discussions
  Columbi Egg Tanker Operation
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  Member: Jeom Paik Post Date: 6/7/2000  
The US OPA 90 requires that all tankers must have double hulls (i.e., double side and double bottom) to operate in the US water. The IMO also provides the similar requirements to be effective in the world. The Columbi Egg tanker design has a single bottom structure, while it has double sides. Can the Columbi Egg tankers operate in the ocean as well as in the US water?
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  Member: Heiwa Post Date: 6/15/2000  
It is incorrect to state that the IMO (Marpol I/13F) requires double hull only for all new tankers. The IMO naturally requires the best protection of the marine environment and has therefore, after adopting double hull as one design, also adopted the single hull Coulombi Egg as another approved design. The US is not party to Marpol I/13F (it is the only country in the world in this respect) and has adopted its own rules (OPA90). OPA90 does not accept designs that are better than double hull. This is quite sad as it prevents innovation and better protection of the marine environment.
Anders Björkman - designer of the Coulombi Egg
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  Member: Pilot Reggy Post Date: 9/11/2001  
An unknown tanker design of my own concept is the "U-type" where the exclusive ballast tanks protect the ship's sides, but also partly the bottom,leaving a sort of tunnel under the keel specially designed for reducing heavy rolling
at sea and also for keeping a real available water-flow access under the ship in case of stranding. Such a VLCC is also equipped with four never damaged "Propulsion cell system" units.
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