| 21. | The study found that New York City needs eight more dry docks.
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| 22. | The ship was moved to dry dock on 8 December.
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| 23. | A short period in dry dock for final modifications and improvements followed.
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| 24. | They were laid down in dry dock and assembled as complete units.
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| 25. | Floating is, however, cheaper than a dry dock.
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| 26. | The vessel was built in two halves in a long dry dock.
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| 27. | The halves were then floated out from the dry dock and mated.
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| 28. | These were stripped and repaired in dry dock or removed by volunteers.
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| 29. | In 1866, Mort expanded his dry dock into an engineering works.
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| 30. | In 1903 the Morse Works completed its floating dry dock.
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