Dry Dock

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A dry dock (sometimes dry-dock or drydock) is a narrow basin or vessel that can be flooded to allow a load to be floated in, then drained to allow that load to come to rest on a dry platform. Dry docks are used for the construction, maintenance, and repair of ships, boats, and other watercraft.

Floating dry dock Jong Shyn No. 8 in Kaohsiung Harbour, Taiwan

Alternative dry dock systems

Apart from graving docks and floating dry docks, ships can also be dry docked and launched by:

Marine railway — For repair of larger ships up to about 3000 tons ship weight
Shiplift — For repair as well as for new-building. From 800 to 25000 ton ship-weight
Slipway, Apart from graving docks and floating dry docks, ships can also be dry docked and launched by:
- Marine railway — For repair of larger ships up to about 3000 tons ship weight
- Shiplift — For repair as well as for new-building. From 800 to 25000 ton ship-weight
- Slipway, Neeltje-Jans was used for the construction of the Oosterscheldekering, a large dam in the Netherlands that consists of 65 concrete pillars weighing 18,000 tonnes each. The pillars were constructed in a drydock and towed to their final place on the seabed.
  A dry dock may also be used for the prefabrication of the elements of an immersed tube tunnel, before they are floated into position, as was done with Boston's Silver Line.
  
  See also
  - List of dry docks
  - Semi-submersible
  - immersed tube tunnel, before they are floated into position, as was done with Boston's Silver Line.

Alternative dry dock systems

See also