Dredging is the excavation of material from a water environment. Possible reasons for dredging include improving existing water features; reshaping land and water features to alter drainage, navigability, and commercial use; constructing dams, dikes, and other controls for streams and shorelines; and recovering valuable mineral deposits or marine life having commercial value. In all but a few situations the excavation is undertaken by a specialist floating plant, known as a dredger.
Cochin Shipyard Ltd (CSL) is one of the largest shipbuilding and maintenance facility in India. It is part of a line of maritime-related facilities in the port-city of Kochi, in the state of Kerala, India. Of the services provided by the shipyard are building platform supply vessels and double-hulled oil tankers. It built the first indigenous aircraft carriers for the Indian Navy, the INS Vikrant. The company has Miniratna status.
Mazagon Dock Shipbuilders Limited (MDL), formerly called Mazagon Dock Limited, is a shipyard situated in Mazagaon, Mumbai. It manufactures warships and submarines for the Indian Navy and offshore platforms and associated support vessels for offshore oil drilling. It also builds tankers, cargo bulk carriers, passenger ships and ferries.
Garden Reach Shipbuilders & Engineers Ltd, abbreviated as GRSE, is one of India's leading shipyards, located in Kolkata. It builds and repairs commercial and naval vessels. GRSE also builds export ships.
Crichton-Vulcan is an abandoned shipyard in Turku, Finland, that once formed the cornerstone of the Finnish shipbuilding industry. The shipyard is best known for the World War II coastal defence ships and submarines it produced.
Severnaya Verf is a major shipyard on Gutuevsky Island in Saint Petersburg, Russia, producing naval and civilian ships. It was founded as a branch of the Putilov Plant in the late 1800s. Under the Soviets, the shipyard was generally known as Shipyard No. 190 and reverted to its former name in 1989.
MV Rocknes was a 166-metre (545 ft)-long rock discharge vessel that hit shallow water and suddenly capsized south of Bergen, Norway on 19 January 2004, killing 18 members of its 30-person crew. At the time of its sinking, it was the world's largest dynamically positioned flexible fall pipe rock dumping vessel. The ship was repaired during 2004 and 2005 and renamed Nordnes.
Dredging, Environmental and Marine Engineering NV (DEME) is an international group of specialised companies in the field of capital and maintenance dredging, land reclamation, port infrastructure development, offshore related services for the oil & gas industry, offshore windfarm installation, environmental remediation a.o. The group is based in Zwijndrecht, Belgium, and has current operations on the five continents.
A trailing suction hopper dredger is a ship that has a full sailing capacity used to maintain navigable waterways, deepening the maritime canals that are threatened to become silted, to construct new land elsewhere or to replace sand eroded by storms or wave action on the beaches. This is made possible by large powerful pumps and engines able to suck sand, clay, silt and gravel.
The Bhim class of tugboats is a class of service watercraft built by Tebma Shipyard Limited, a subsidiary of Bharati Shipyard Ltd, for the Indian navy.
The Madan Singh class of tugboats are series of service watercraft built by Tebma Shipyard Limited, for Indian navy during 1999. Propulsion is provided by Voith Schneider Propellers. The Nakul-class tugboat is a follow-up order of the Madan Singh-class tugboat.
B.C. Dutt class of tugboats are series of service watercraft built by Tebma Shipyard Limited, for Indian navy during 1998-99. The vessels in the class have a rated capacity of 25 ton bollard pull. The propulsion is provided by Schottel Rudder Propeller (SRP). Bhim class tugboat is a follow-up order of B.C. Dutt class tugboat.
Tebma Shipyards Limited is a Chennai based shipbuilding company in India. The company has delivered more than 150 vessels, mainly offshore support vessels. It was shut down in June 2018 due to various reasons.
The Nikaraksha class of bucket dredger is a pair of yardcraft built by Mazagon Dock Limited, Mumbai for the Indian Navy. Nikaraksha commissioned in 1967 and has a dredging capacity of 1,000 cubic yards (760 m3) per hour at a 45-foot (14 m) dredging depth.
INS Vikrant is an aircraft carrier in service with Indian Navy. The carrier is the first to be built in India and was constructed by the Cochin Shipyard Limited (CSL) in Kerala. The namesake Vikrant is a tribute to India's first aircraft carrier INS Vikrant (1961). Vikrant means "courageous" in Sanskrit. The motto of the ship, "जयेम सं युधिस्पृधः"(Sanskrit), means "I defeat those who fight against me".
The 8 cubic meter class dredger is a class of naval auxiliary ship currently in service with the People's Liberation Army Navy (PLAN). The complete name of the class is 8 cubic meter grab dredger, and it can also be used as a crane ship, capable of lifting a maximum of a hundred tons for each single lift. In 1984, the PLAN Equipment and Technology department signed a contract with East Sea Shipyard to build an 8 cubic meter class dredger / crane ship designed to meet the requirements of Nippon Kaiji Kyokai (ClassNK). The general designers were Xun Zhi-Liang (荀志亮) and Zhang Lin-Sheng (张林生). Construction began in December 1984, and after completion, the ship sailed to Qingdao in June 1985 for further sea trials, which were completed successfully. The following month, the ship was handed over to the PLAN.
J. & K. Smit was a Dutch shipbuilding company located in Kinderdijk and Krimpen aan de Lek. Its successor is now part of Royal IHC.
The Corozal was a Scottish-built dredger used on the Panama Canal. The Renfrew-based firm of Messrs. Wm. Simons & Company won a US government tender for its construction in 1911. The vessel was launched in November 1911 and taken into US government service as the US Corozal. It was the most powerful dredger ever built at that time. The Corozal operated on the difficult Culebra Cut, deepening a channel excavated by hand and dynamite. It became the first ship to sail through the cut in December 1913, shortly before the canal opened to traffic. The Corozal was sold to the Arundel Corporation in 1926 and scrapped in 1956.
Verschure & Co's was a shipbuilding company and machine factory in Amsterdam.
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