Haiqing class submarine chaser
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Unlike western navies, the People's Liberation Army Navy did not have dedicated patrol boats / craft in its inventory, instead, a variety of naval vessels ranged from minesweepers to fast attack craft are deployed for patrol duties. 20 Haiqing class submarine chaser / patrol boat is one of such Chinese designs and it is a cross between gunboats and the submarine chaser based on Type 037 (Hainan class). These boats were first built by the Qiuxin Shipyard of Shanghai, and later by Huangpu and Qingdao shipyards. There is some disagreement over the type designation of this class, some sources claim it is Type 037I, while others claim it is Type 037IS.
- Displacement: 478 t
- Length: 62.8 m
- Beam: 7.2 m
- Draft: 2.4 m
- Speed: 28 kt
- Range: 1,300 nm @ 15 kt
- Propulsion: 4 Chinese PR 230ZC diesel engines @ 4,000 hp with 4 shafts
- Complement: 71
- Armament:
- Guns: 4 Type 76A 37 mm gun (II x 2) and 4 Type 69 14.5 mm heavy machine guns (II x 2)
- ASW: 1 Type 87 6-tubed ASW mortar
- Radars: 1 Type 723 surface search radar
- Sonar: Chinese copy of French Thomson-Sintra medium frequency SS-12 VDS
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