Jumboization is a technique in
shipbuilding
Shipbuilding is the construction of ships and other Watercraft, floating vessels. In modern times, it normally takes place in a specialized facility known as a shipyard. Shipbuilders, also called shipwrights, follow a specialized occupation th ...
consisting of enlarging a
ship
A ship is a large watercraft, vessel that travels the world's oceans and other Waterway, navigable waterways, carrying cargo or passengers, or in support of specialized missions, such as defense, research and fishing. Ships are generally disti ...
by adding an entire section to it. By contrast with refitting or installation of equipment, jumboization is a long and complex endeavour which can require a specialized
shipyard
A shipyard, also called a dockyard or boatyard, is a place where ships are shipbuilding, built and repaired. These can be yachts, military vessels, cruise liners or other cargo or passenger ships. Compared to shipyards, which are sometimes m ...
.
Enlarging a ship by jumboization allows an increase in its capacity and revenue potential without needing to purchase or build an entirely new ship. This technique has been used on
cruise ship
Cruise ships are large passenger ships used mainly for vacationing. Unlike ocean liners, which are used for transport, cruise ships typically embark on round-trip voyages to various ports of call, where passengers may go on Tourism, tours k ...
s and
tankers, as well as smaller vessels like sailing or fishing ships.
Methods
Large ships often have a long midsection with a uniform profile. In such cases, the ship is cut in two pieces and an additional section is inserted in between. This operation must be performed in a
drydock
A dry dock (sometimes drydock or dry-dock) 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, ...
.
On large ships, the additional sections are typically 20 to 30 metres long, consisting of an oil tank, a cargo ship hold, or a group of
cabins, depending on the type of ship. The tanker ''
Seawise Giant
TT ''Seawise Giant''—earlier ''Oppama''; later ''Happy Giant'', ''Jahre Viking'', ''Knock Nevis'', and ''Mont''—was a Oil tanker, ULCC supertanker and the longest self-propelled ship in history. It was built in 1974–1979 by Sumitomo Heavy ...
'' became the largest ship in the world after her jumboization.
Smaller ships are usually jumboized by replacing the entire
bow or
stern
The stern is the back or aft-most part of a ship or boat, technically defined as the area built up over the sternpost, extending upwards from the counter rail to the taffrail. The stern lies opposite the bow, the foremost part of a ship. O ...
section of the ship. This is done because the shape of their hull is usually incompatible with the previous method.
See also
*
List of stretched cruise ships
References
{{reflist
External links
2011 Jumboisation/Body Swappingat Keppel Shipyard
Shipbuilding