Navy Marine Survey Vessels
In the early days of the development of the maritime industry, all countries have given the mission of maritime safety to an effective military department. From 1921 to the present, the presidents and directors of successive international hydrographic organizations have a total of 48 people, 42 of whom are admirals and major generals of the United States, Britain and other Western countries. Of the current members of the International Hydrographic Organization, 62.5% of the nationally registered authorities are the Ministry of Defence and the Navy. Due to national security, the exchange of measurement results between countries has been approved by the Navy. Although the results of the survey ship can be widely used in the field of marine resource development, marine environmental protection and scientific investigation, the first is still serving the military struggle. The design, construction and technical configuration of the survey vessel are mainly for the development of maritime operations and sophisticated weapons.
In 1957, China's first marine scientific research ship, the "Venus", was put into use, and the next year, a near-shore inspection was conducted. Early marine scientific research was limited to intertidal and nearshore marine life and island measurements. For a long time, it mainly served military defense.
Early naval survey vessels were mainly divided into small channel survey vessels and offshore survey vessels. Small-scale navigation survey ships include Type 068, Type 069, etc., which are not only small in tonnage but also single in function. In the 1970s, according to the naval development plan, the sea survey work was required to expand to 200 nautical miles along the coast. Therefore, a new type of survey vessel with good airworthiness and long-lasting power and high self-sustainability is required. The Type 646 and Type 635 sea-sweeping survey vessels came into being, and two and five ships were built separately. They were used as workboats equipped with special sea-sweeping equipment and various measuring instruments. These two types of ships took on a long period of time. Measurement tasks in coastal and offshore areas of China.
The first type of ocean-going survey vessel in the true sense of the Navy is the 625C. This type of ship is a 3,000-ton ocean measurement ship, which was designed and built by the Shanghai Naval Shipbuilding Plant commissioned by the Naval Navigation Guarantee Department and the Marine Equipment Science and Technology Department. Gravity measurement can be carried out in China's coastal and medium-sized sea areas, as well as comprehensive measurement tasks such as water depth, magnetic force, hydrology and meteorology in the middle and far sea. The Navy had a total of two, respectively, the South 411 and the South 412, of which the South 411 joined the China Sea Police, the South 412 has been retired and was dismantled.
By the end of the 20th century, the 636-type marine integrated survey vessel Li Siguang was in service and was the first 5,000-ton ocean-going survey vessel designed and manufactured by China. Its advanced level at that time was undoubted, but it had not made outstanding contributions to China's marine sea survey business. However, in 2012, according to the needs of the country, the ship was retired in advance and handed over to the fishery administration department. It became the 206 fisherman of China Fishery Administration, which is now the 2,506 sea police, and became a frequent visitor to the Diaoyu Islands cruise law enforcement.
After the handover, the ship also carried out corresponding upgrades and modifications, such as the installation of side pushes, the replacement of work boats, the upgrading of marine equipment, etc., to better adapt to the identity of the official ship. According to another source, the original military investigation equipment on the ship has not been dismantled. It is not surprising that there have been many examples of the navy wearing vests in these years. After all, it is a fine tradition.
The backbone of the Navy's current ocean-going comprehensive survey is the large-scale construction of the 636A survey vessel, which has been divided into two batches. A total of eight vessels have been built. Currently, five vessels are in service, one will be commissioned, and the other two have also been launched. The whole ship is equipped with more than 20 measuring systems, which can carry out water depth measurement, seabed geomorphology measurement and sea surface surface geological exploration, and has strong deep sea scanning test capability.
The first ship of the Type 636A marine comprehensive survey ship from May to October 2014, the “Zhu Kezhen” ship was ordered to perform the search mission of Malaysia Airlines MH370 lost passenger aircraft. It has crossed the equator twice, three times with the Malaysian and Australian delegations, and seven batches of international joint search and rescue. The center provides more than 4 million sets of data for sweeping test results. At the beginning of February 2015, the squadron was again ordered to travel and perform a 180-day round-the-world training combined with missions.
In addition, the Navy also installed six twin-body survey vessels, two of each of the three major fleets, also known as the Chinese version of the US Navy Impecable. They are mainly used for offshore channel surveys. However, among the six ships, Donggao 233 is an enhanced type of underwater sound detection. It is equipped with a set of active and passive composite line array sonars on the 056A frigate, which enhances its search for enemy submarines.
In recent years, Chinese military and civilian marine survey vessels have increasingly entered the world's oceans for investigation and accumulated valuable marine data. Although we used to be relatively backward in the field for technical reasons, with the current shipbuilding technology, With the development of detection technology, we are gradually catching up.
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