Dry dock

U.S. Navy submarine USS Greeneville in a graving dock
A US Navy littoral combat ship in a floating drydock, NASSCO 2012
A US Navy frigate on a marine railway drydock

A dry dock (sometimes drydock or dry-dock) is used for the construction, maintenance, and repair of ships, boats, and other watercraft. There are several basic types of dry docks:

  • Graving or basin docks
  • Floating dry docks
  • Marine railways
  • Vertical lifts
  • Marine travel lifts
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