Dry dock
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A 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 R
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
Floating Dock. Woodcut from Venice (1560)
PD-50
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PD-50, Soviet designation Project 7454, was a Russian large floating dry dock built at the Götaverken Arendal shipyard in Gothenburg, Sweden and commissioned in the 1980s. At the time, it was the worl
Dry dock
…Works' repair facilities. A downside of floating dry docks is that unscheduled sinkings and off-design dives may take place, as with the Russian dock PD-50 in 2018. The "Hughes Mining Barge", or HMB-1, is a covered, floating drydock that is also submersible to support the secret transfer of a mechanical…
PD-50 (left) in Roslyakovo, August 2016
Admiral Kuznetsov dry-docked in PD-50, June 2015