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Type 625 ocean survey ship

If the combat effectiveness of the maritime battlefield is to be fully guaranteed, a thorough and advanced understanding of the marine environment must be carried out. An important basic work is ocean measurement. The ocean survey ship was born for this mission. The early measuring vessels were mainly used to measure the water depth and ensure the safety of the navigation channel. At present, the task of ocean measurement has been extended to seabed topography, landforms, marine meteorology, hydrology, and geophysical properties. It should be noted that marine survey vessels are not born for "civil use". Although their results are widely used in civil resources development, environmental protection and other civilian fields, serving their military purposes is still their first mission.

Nan Diao 411 naval hydrographic vessel, transferred as patrol ship Haiyang 11 to Marine Surveillance in 2012 and to Coast Guard in 2013 as Haijing 3368. The "China Sea Police 3368" modified by the Guangzhou Ship and Ocean Engineering Design and Research Institute was officially delivered to the 8th detachment of the China Oceanic Administration in December 2015.

"China Sea Police 3368" is the 3,000-ton main law enforcement ship of the Chinese Marine Police Force in the South China Sea. The ship was originally a 3,000-ton marine survey vessel. The Guangzhou Shipyard combined with the current maritime rights protection in the South China Sea, and modernized it, greatly improving the ship's law enforcement capabilities. After successful modification, the ship has enhanced its anti-wind and anti-collision capabilities, improved the information system assembly and automation, improved the performance of safety and environmental protection, and revived the old ship. It is worth mentioning that the ship is also equipped with a towed sonar detection and acoustic interference system, which can not only survey the hydrogeological environment of China's seas, but also effectively combat and illegally detect foreign vessels in my territorial waters.

It is understood that the Guangzhou Shipyard has analyzed the excellent ship type characteristics of the Coast Guards of various countries and has successfully developed such a large number of new types of localized sea police, sea patrol and fishery government new law enforcement vessels.

625/625B survey vessel

The 625/625B marine geological comprehensive survey vessel is a 3,000-ton ocean survey vessel designed and constructed by the Naval Navigation Guarantee Department and the Haideng Science and Technology Department. The ship can carry out gravity measurement in the coastal and medium-sized sea areas of China, and can undertake comprehensive measurement tasks such as water depth, magnetic force, hydrology and meteorology in the middle and far sea.

Requirement of Type 625 was issued in the late 1970s, and a total of four units were planned. Construction of the first unit begun in the early 1970s, and others followed. The same type of ship: Ocean No. 2 Ocean No. 3 Ocean No. 4: On April 1, 1971, Ocean No. 1 started. On February 2, 1972, Ocean No. 1 was launched, and the ship was tested on September 3 of the same year. On November 30, it was completed and signed for delivery.

Based on the experience of deployment, the fourth unit has some improvement, and the difference is large enough to have a different designation as Type 625B. Ocean No. 4 was built in October 1980 by Shanghai Hudong Shipyard. "Ocean No. 4" is equipped with large oil storage, seawater desalination, oil sewage treatment equipment, 10,000-meter winch, priming, collision avoidance radar and other equipment, suitable for ocean missions. 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, and this was one of the very first deals for these US companies to have successfully marketed their products in China. At present, the main survey equipment on board are: Sercel NR103GPS Global Positioning System, Hypack Integrated Navigation System, SeaBeam2112 Multibeam Sounding System, KSS31 Marine Gravimeter, G801 Magnetometer, BATHY2000P Shallow Profiler, Single Channel Seismograph, ISIS/Geo- Plus digital and analog single seismic system, deep sea camera system, MARK III CTD measurement system, Andra current meter, Rytheon 10,000 meters depth sounder, Benthos large gravity piston corer, Benthos cable gravity corer, Ocean 50 Type cable grab sampler, box sampler, multi-tube sampler, cable-free self-returning grab, crust trawling, tuberculosis and surface biotrawling. In addition, the on-site chemistry laboratory is equipped with physical, chemical, and biological field analysis instruments such as X-ray fluorescence analyzer, atomic spectrophotometer, pH meter, sediment shear meter, and polarizing microscope.

Type 625C

The Type 625C ocean measuring ship is a 3,000-ton vessel designed by the Naval Navigation Guarantee Department and the Sea Department of Technology which commissioned the Hudong Shipyard to design and build. The ship can carry out gravity measurement in the coastal and medium-sized sea areas of China, and can undertake comprehensive measurement tasks such as water depth, magnetic force, hydrology and meteorology in the middle and far sea.

Type 625C is the second batch of Type 625 series and it is development of earlier Type 625A/B. The main difference is that Type 625C 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. For these reasons, this second batch received Type 625C designation.

Type 625C program begun in March 1979 when Hudong-Zhonghua Shipyard, the original builder of earlier Type 625A/B was once 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 Sept 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 because those ships are jointly owned by PLAN and civilian establishments, the first two ships are manned by PLAN crew because both ships are owned by PLAN.

The ship’s navy built two ships, named “Ocean 11” and “Ocean No. 12”. In March 1979, the Naval Navigation Guarantee Department and the Hudong Captain signed the “Technical Agreement for the 3,000-ton Marine Measurement Vessel”, and the “Supplementary Technology Agreement” was signed in June and July. The drawing was reviewed in January 1980. In September 1980, two ships were started at the same time. They were launched in June and July 1981. They were delivered at the same time on November 24, 1981. They served in the First Marine Investigation Brigade of the South China Sea Fleet (now the South China Sea Fleet Reconnaissance Ship Brigade). Later renamed: South 411 (Ocean 11), South 412 (Ocean 12).

On December 4, 1979, “Science No. 1” started construction at Shanghai Hudong Shipyard. It was launched on January 19, 1981 and was built into the Oceanic Institute with a total investment of 16.88 million yuan. The ship has ten laboratories, and the working deck is equipped with 13 sets of various performance winches such as marine geology, hydrophysics, and marine geophysics. It is equipped with six high-pressure air compressors and 12 high-pressure gas cylinders for professional investigation. Powerful sound source guarantee. The ship is equipped with advanced satellite navigation equipment and has undertaken many national voyage projects and international cooperation projects.

The South China Sea Institute of Oceanography also owns a ship of the same class, namely “Practice No.3”. It is used for comprehensive scientific investigations of physical marine environment, marine life, marine chemistry, marine geology, etc., including satellite navigation and positioning system, 10,000 meters depth sounder, 6 professional twisting four and 14 laboratories.



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Page last modified: 02-12-2019 18:06:45 ZULU