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Type 625 Hai Yang Class (Seismological Research Ship)

Type 625 oceanographic research ship is a series of oceanographic research ship developed by China for its People's Liberation Army Navy (PLAN). The 625/625B marine geological comprehensive survey ship is a 3000-ton marine survey ship, designed and built by the Hudong Shipyard commissioned by the Naval Navigation Assurance Department and the Marine Science and Technology Department. This ships can carry out gravity measurement in the coastal areas of China and the middle and far seas, and can undertake comprehensive survey tasks such as water depth, magnetism, hydrology and meteorology in the middle and far seas.

The series consisted of three models, A, B & C, but A & B are usually grouped together as one because C model differs from Models A & B on much greater scale. These ships was operated by the Chinese Academy of Sciences, they resembled passenger liners; white-painted.

On January 31, 1956, at the mobilization meeting to formulate the "1956-1967 Science and Technology Vision Plan" (hereinafter referred to as "12-year plan"), a planning leadership group was set up to lead the formulation of scientific planning. Under the call of "advance to science", through the implementation of the "12-year plan", New China has built its own modern science and technology system and national defense science and technology system, which has greatly supported the development of the country's economic, social and national defense undertakings. And promotion. In the great construction and development of China's modern science and technology undertakings, "(Chinese Academy of Sciences) cooperated with the 'two bombs' to create a satellite industry, implement 'four emergency measures', deploy and organize comprehensive investigations and basic theories of natural resources.

The research fully played the role of the 'locomotive' and created the glory of the development of science and technology in the 10 years before the 'Cultural Revolution', while demonstrating the strength as a special strategic resource of the country." In the development of major key technologies, emerging cutting-edge technologies, important basic disciplines and resource and environmental inspections, it has made outstanding contributions to the country and has become a strategic resource for achieving national goals. The Chinese Academy of Sciences has also evolved from a small unit with only a few hundred people to a scientific army with 50,000 people. The research funding has increased from 2.872 million yuan in the spring of 1950 to 353.48 million in 1965, an increase of 117 times and a national Strategic technology power.

The Marine Science Research Ship Operation Management Center established a management center for the Institute of Oceanology of the Chinese Academy of Sciences, responsible for the professional operation and management of marine integrated survey vessels. Its main duties are to be responsible for the daily operation, maintenance and management of the marine scientific comprehensive survey vessel; to formulate the voyage plan, to carry out the sea missions approved by the Marine Science Research Ship Operation Management Committee, to ensure the completion of scientific investigation tasks with high quality; to be responsible for the maintenance and management of ships And shipborne equipment and ship-shore integrated network system; responsible for personnel training, international exchange, quality, archives, information and financial management of crew and technical team.

Type 625A/B is the first member of the Type 625 series. The Requirement for the Type 625 was issued in the late 1970s, when a total of four units were planned. Construction of the first unit began in the early 1970s, and others followed. On April 1, 1971, Ocean One started construction. On February 2, 1972, Ocean One was launched, and the delivery test was carried out on September 3 of the same year. It was completed and signed for delivery on November 30. Ocean 4 was built and shipped from Shanghai Hudong Shipyard in October 1980. "Ocean No. 4" is equipped with large oil tanks, sea water desalinizers, oily sewage treatment equipment, 10,000-meter winches, first pushers, collision avoidance radars and other equipment, which is suitable for undertaking ocean exploration missions.

By 2019, the main survey equipment on board are: Sercel NR103 GPS global positioning system, Hypack integrated navigation system, SeaBeam 2112 multi-beam sounding system, KSS31 ocean gravimeter, G801 magnetometer, BATHY2000P shallow profiler, single channel seismometer, ISIS/Geo- plus digital and analog single channel seismic system, deep-sea camera system, MARK III CTD measurement system, Andhra current meter, Rytheon 10,000-meter depth sounder, Benthos large gravity piston corer, Benthos cabled gravity corer, Ocean 50 Types include cable grab sampler, box sampler, multi-tube sampler, cable-free self-return grab, crust trawl, nodule and surface biological trawl. In addition, the on-site chemical laboratory is also equipped with X-ray fluorescence analyzer, atomic spectrophotometer, pH meter, sediment shearing instrument, polarizing microscope and other physical, chemical and biological on-site analysis instruments.

Based on the experience of deployment, the fourth unit had some improvements, and the difference is large enough to have a different designation as Type 625B. Subsequently, the original Type 25 was re-designated as Type 625A, and the term Type 625 is used to denote all models in the series. These ships are named Ocean (Haiyang) 1 through Ocean 4 respectively. The main difference between the fourth unit and the first three is that the fourth unit is larger and able to operate for longer period of time in extended missions. The fuel tank is increased in size, and sea water distillation and oil and water processing systems were upgraded. A bow thruster and new radars were added. Ocean 4 carries many western scientific research instruments such as that manufactured by US companies including Raytheon, one of the very first deals for these US companies to have successfully marketed their products in China.

A development of earlier Type 625A/B, the Type 625C is the second batch of Type 625 series, is larger, with displacement increased by more than a third to more than three thousand tons in comparison to the original Type 625A. The internal layout is also different between Type 625C and earlier Type 625A/B. The Type 625C program begun in March 1979 when Hudong-Zhonghua Shipyard, the original builder of earlier Type 625A/B was again selected to build the follow on ships. In June and July of the same year, supplementary contractual clauses were signed, and in January 1980, the design was approved. Construction of both ships begun at the same time in Septtember 1980, instead of sequentially as in earlier Type 625A/B series.

Contrary to earlier Type 625A/B series which are operated by a mixed crew of civilian and naval personnel, the first two ships are manned by PLAN crew. The method of deployment of the third and fourth ships of Type 625C, respectively named as Science (Kexue) 1 and Practice (Shiian) 3, reverted to the earlier pracice with Type 625A/B series in that these ships are manned by a mixed crew of civilian and naval crew because these ships are jointly operated by PLAN and civilian governmental agencies.

Build by the same shipyard, Science 1 cost ¥16.88 million and has a different internal layout than earlier two units, with a total ten labs on board. Construction of Science 1 actually began before the two naval units, and the ship was also launched before the two naval units. However, because many new equipment was incorporated, most of which was for the very first time, sea trials took much longer and the ship entered service after the two naval units and hence considered the third ship of Type 625C. Experience from Science 1 helped the fourth unit, Practice 3, which had more advanced scientific instruments. In addition to equipment on board, Practice 3 also differs from previous three units in that it has a total of fourteen labs on board.

The 625C marine survey ship is a 3000-ton marine survey ship, designed and built by the Hudong Shipyard commissioned by the Naval Navigation Assurance Department and the Marine Science and Technology Department. This ship can carry out gravity measurement in the coastal areas of my country and the middle and far seas, and can undertake comprehensive survey tasks such as water depth, magnetism, hydrology and meteorology in the middle and far seas.

The Navy built two ships of this type, named "Ocean 11" and "Ocean 12". In March 1979, the Naval Navigation Assurance Department and Hudong Captain signed the "3000-ton Ocean Survey Ship Technology Agreement", and in June and July signed the "Supplementary Technology Agreement." The drawing review was completed in January 1980. In September 1980, the two ships started construction at the same time. They were launched in June and July 1981. They were completed and delivered on November 24, 1981. They served in the South China Sea Fleet No. 1 Ocean Investigation Group (now merged with the South China Sea Fleet Reconnaissance Ship Group) ). It was later renamed: South Diao 411 (Ocean 11) and South Dune 412 (Ocean 12).

On December 4, 1979, "Science One" started construction at the Shanghai Hudong Shipyard. It was launched on January 19, 1981 and returned to the Institute of Oceanography with a total investment of 16.88 million yuan. The ship has ten laboratories, and the operating deck is equipped with 13 sets of winches with various performances such as marine geology, hydrophysics, marine geophysics, etc.; and is equipped with six high-pressure air compressors and 12 high-pressure gas cylinders for professional investigations. Strong sound source guarantee. The ship is equipped with advanced satellite navigation equipment and has undertaken many major national voyage projects and international cooperation projects.

The South China Sea Institute of Oceanography also owns a ship of this class, namely "Shijian No. 3". It is used for comprehensive scientific investigations of physical marine environment, marine biology, marine chemistry, marine geology, etc. It has satellite navigation and positioning system, 10,000-meter depth sounder, 6 professional four-four and 14 laboratories.

By 2020, the ship support platform provided by the Marine Science Research Ship Operation Management Center includes four survey vessels, such as “Science”, “Science No.1”, “Science No.3” and “Innovation No.”, which are from nearshore to ocean. The comprehensive investigation capability of the ship base from shallow sea to deep water is the main ship of China's offshore and adjacent oceans.

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Page last modified: 01-08-2021 14:08:17 ZULU