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Shiyan-1 SWATH Research Vessel

A SWATH (Small Water-plane Area Twin Hull) expedition boat, designed by China Ship Scientific Research Center, and jointly developed by CAS Institute of Acoustics, CAS South China Sea Institute of Oceanology, and Shenyang Automation, was delivered to its users on April 15, 2009. The SWATH boat Experiment I has a length of 60m, width 26m, tonnage 2,560 tons, and a total weight of 3,071 tons. Designed with a full steel structure, the expedition boat is able to travel 8,000 nautical miles in a run, at a top speed up to 15 knots, with an endurance that can last for 40 days. Able to work smoothly even under sea scale 6, the new boat was put into operation in May 2009 at Guangzhou Harbor for diverse offshore or ocean going scientific studies, including aquatic acoustics, marine physics, geological biology, and marine/atmospheric environment.

Small water plane area twin hull vessels, which are referred to by the acronym SWATH, and which also have been called semi-submerged vessels, have heretofore been developed for high stability and safety at sea. This type of vessel has two submerged, parallel, torpedo-shaped hulls and vertical struts which extend upwardly a substantial distance above the water line to a connecting cross structure that spans the struts. The superstructure and deckhouse of the vessel is supported upon this cross structure. Because the submerged hulls provide the entire buoyancy of the vessel, such have not been capable of transporting large tonnages of cargo.

Because of its superior stability and maneuverability at all speeds, the SWATH ship offers an excellent platform from which various physical measurements of the ocean environment can be carried out. The usual means for carrying out real-time marine measurements is to trail a sensor package behind the moving marine vessel by means of a negatively buoyant towline attached between the vessel and the package. In conventional such an apparatus is normally deployed by paying out the package and line over the stern of the ship and towing them behind as the vessel moves through the water.

In the case of the SWATH ship, the stern deployment technique can interfere with efficient vessel operation and pose a danger of equipment damage. The combined weight of the towed array, storage reel, and related mechanical equipment is such that if the equipment were to be located at the stern of the SWATH, rather than amidships, the vessel would become imbalanced to the detriment of its stability and maneuverability. Also, because of the horizontal stabilization member connecting the submerged hulls at the stern of the ship, and because of the propellers which protrude from the hulls, a sensor package cannot be deployed from a position amidships while the ship is moving in a forward direction without running the risk of damage to the package, towline, or ship.

Shiyan 1 Research Vessel was jointly built by the Institute of Acoustics-(IOA), the South China Sea Institute of Oceanology-(SCSIO) and Shenyang Institute of Automation-(SIA) of Chinese Academy of Sciences (CAS). It is the first vessel in service that could be considered as the large-scale CCS classification SWATH catamaran type with AC variable frequency electric propulsion system. The vessel has many advanced features such as excellent noise reduction and shock absorption, full automation and dynamic positioning etc, which can support the scientific investigation of multidisciplinary and interdisciplinary among acoustics, physical oceanography, marine geology, marine biology, marine chemistry and marine atmospheric environments etc. in coastal waters, open sea and ocean.

It can support a wide range of large-scale observation network to layout, observe, control, remote sensing and monitor, and also can carry out the research about the real-time three-dimensional marine environment monitoring system and comprehensive information system. It is the high performance and ideal laboratorial platform for marine science and hydro acoustics.

Shiyan1research vessel has superior manipulation, sea keeping, automation, network sharing, dynamic positioning control and economic performance providing a good experimental platform for marine scientific research.

The Chinese survey ship Shi Yan 1 was discovered entering the Exclusive Economic Zone (EEZ) of India in the Andaman Sea in September 2019, within 200 nautical miles from the Andaman and Nicobar Islands. of India. Indian media reported that the country's maritime reconnaissance aircraft had detected Chinese ships approaching Port Blair and signaled the navy to send a warship to chase. Commenting on the infiltration, Indian Navy Commander Karambir Singh said the country's position was that if an unfamiliar vessel wanted to operate in India's EEZ , a prior notice would be required to obtain permission.

Vessel Name SHI YAN 1
Ship type Research Vessel
Flag China
Homeport
Gross Tonnage 3071
Summer Deadweight (t) 698
Length Overall (m) 61
Beam (m) 26
Draught (m)
Year of Build 2009

Shiyan-1 SWATH Research Vessel Shiyan-1 SWATH Research Vessel Shiyan-1 SWATH Research Vessel Shiyan-1 SWATH Research Vessel Shiyan-1 SWATH Research Vessel Shiyan-1 SWATH Research Vessel

Shiyan-1 SWATH Research Vessel Shiyan-1 SWATH Research Vessel



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