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Type 625 oceanographic research ship is a series of oceanographic research ship developed by Chin a for its People's Liberation Army Navy (PLAN). 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. ==Type 625A/B== Type 625A/B is the first member of the Type 625 series. 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. 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. 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 from Ocean (Haiyang, 海洋) 1 thru 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/water process systems were upgraded. 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. Specification:〔(Type 625 )〕 *Length (m): 104.27 *Length between perpendiculars (m): 58 *Depth (m): 7.8 *Beam (m): 13.74 *Height (m): 27.5 *Displacement (t): 2608 *Main propulsion: two B&W 6K45GFdiesel engine @ 3533 kW each *Cruise speed (kt): 15 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Type 625 research vessel」の詳細全文を読む スポンサード リンク
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