Saryu-class patrol vessel vs Type 037 corvette

Sukanya class^[source]

Haizhui class^[source]

Shachi class (2017) (cancelled) Shachi class (2026)^[source]

type 056 / Jiangdao class^[source]

2013 – present^[source]

1964–present^[source]

6^[source]

6^[source]

100+^[source]

6^[source]

67 (PLAN)^[source]

Offshore patrol vessel^[source]

Submarine chaser^[source]

Sperry Bridgemaster I-band navigation radar EON-51 electro-optical FCS^[source]

1 × Type 351 Radar "Pot Head" surface search radar 1 × Soviet Tamir-II hull mounted or SJD-3 telescoping high frequency active sonar^[source]

Sanket Mk III Electronic Support System Communication Intelligence System ELK 7036 4 × Kavach chaff launchers^[source]

1 × 76 mm/62 Oto Melara gun 2 × 30 mm/65 AK-630 CIWS^[source]

4 × Chinese Type 66 57 mm (2.2 in) guns (2×2) 4 × Chinese Type 61 25 mm (0.98 in) guns (2×2) 4 × RBU-1200 or Type 81 ASW rocket launchers 2 × BMB-2 ASW mortars 2 × depth charge rails with more than 20 depth charges, and mine rails (10 mines total)^[source]

1 × HAL Dhruv^[source]

India^[source]

People's Republic of China^[source]

China^[source]Country/countries explicitly given in the equipment row Origin column; not the country operating the row. Hainan class

1964–1982^[source]

1 (North Korean)^[source]

series 400–500 ton corvette type classes in service^[source]

The Type 037 corvette is a series 400–500 ton corvette type classes in service with the People's Liberation Army Navy . Unlike western navies, the People's Liberation Army Navy does not have dedicated patrol boats in its inventory. Instead, a large variety of corvette type classes, in the form of missile boats and submarine chasers fulfill the tasks of patrolling China 's territorial waters. The Egyptian Navy operates eight vessels.^[source]Type 037 corvette · Lead; only the objects and conditions stated in this passage

In addition to anti-submarine warfare missions, these simple yet effective units are also capable of a wide variety of missions such as mine laying and patrol. These boats were first equipped with Soviet Tamir-11 (MG-11, NATO reporting name: Stag Hoof) hull-mounted sonars which had a typical range of 3 km (1.9 mi), but in the 1970s, they were superseded by domestic Chinese SJD-3 sonar, which is modification of original MG-11: instead of being fixed to the hull, SJD-3 has a telescoping arm, so when not in use, the sonar is stored in the hull, and when deployed, the sonar is lowered into water several meter below the hull, thus increased detection range by avoiding baffles generated by the hull.^[source]Type 037 corvette · Type 037 Hainan-class submarine chaser; only the objects and conditions stated in this passage

The main difference is that four ASW rocket launchers have replaced the original two ASW mortars. The biggest improvement, however, is in the sonar system. Original SJD-3 sonar on earlier Type 037 class submarine chaser is replaced by a 13 kHz (2 frequency ranges) French Thomson Sintra SS-12/DIP 12 hull mounted (HM)/variable depth sonar (VDS). DIP 12, the VDS version weigh 4 tons and has a 200-meter cable with towing speed of 16 kn, and the range is selectable at 2, 4, 8 and 16 km respectively. However, during deployment, it was discovered that the endurance of this class is limited and the capabilities of SS/DIP 12 sonar system could not be fully exploited. There is some disagreement over the type designation of this class, some sources claim it is Type 037I , while others claim it is Type 037 Mod (for modified or modernized).^[source]Type 037 corvette · Type 037 Haijiu-class submarine chaser; only the objects and conditions stated in this passage

The ships are armed with two 6-tubed anti-submarine mortar launchers. The earlier boats are fitted with two manually operated twin-barrel 37 mm guns, but they have been replaced by two automatic 37 mm guns on the later variants. They also have various other mounted heavy machine guns for patrol duty. These weapons focus on a general-purpose patrol boat, with only a limited anti-submarine capability.^[source]Type 037 corvette · Type 037I Haiqing-class submarine chaser; only the objects and conditions stated in this passage

The Type 037IG missile boat (NATO: Houxin class ) were first built by Qiuxing and Huangpu Shipyard from 1991 through 1999 for the People's Liberation Army Navy (PLAN). In addition to the PLAN, 6 were exported to Myanmar : 2 in 1995, 2 in July 1996, and 2 in late 1997. This boat is the anti-ship version of the Type 037 submarine chasers, armed with missiles rather than torpedoes. It was also used as a cheaper alternative to the Type 037II class.^[source]Type 037 corvette · Type 037IG Houxin-class missile boat; only the objects and conditions stated in this passage

The original one-off design was by an American company, the H-3 group, the design was for a 245-ton boat, equipped with Harpoon SSMs, OTO Melara 76 mm guns, gas turbine engines and waterjet propulsion. However, this specifications was too complicated for China, and a major redesign was begun, resulting in a boat with C-801 SSMs, diesel engines and propellers instead. The OTO Melara 76 mm gun was retained in the revised design, called in 1988 the EH-3D (and in 1996 the 520T), but failed to survive the cooling of relations with the West following the Tiananmen Square protests of 1989 and the resulting end of Western participation in Chinese military projects.^[source]Type 037 corvette · Type 037II Houjian-class missile boat; only the objects and conditions stated in this passage

The first vessel was built in 1990, as a technology demonstrator and proof-of-concept trials vessel, it fired its first C-801 missile in a 1995 exercise. Three more vessels were built in 1995/96. However, due to technological difficulties (particularly with regards the license produced SEMT diesel engines), high price, and over sophisticated design compared to the PLAN standard, further production was terminated. A fifth vessel, hull number 774, was built in 2001, as another proof of concept vessel for modified SEMT engines with new turbochargers and license produced Russian AK-176 76 mm gun.^[source]Type 037 corvette · Type 037II Houjian-class missile boat; only the objects and conditions stated in this passage

The Type 037II's twin 30mm cannons are controlled by the Type 88C Electro-optical targeting system which has an infrared seeker and automatic tracker along with a laser rangefinder.^[source]Type 037 corvette · Type 037II Houjian-class missile boat; only the objects and conditions stated in this passage

The Type 037II's tracking radar is the Type 348G tracking radar while its search radar is the Type 348S search radar.^[source]Type 037 corvette · Type 037II Houjian-class missile boat; only the objects and conditions stated in this passage

• Reported operator · Indian Navy
• Reported operator · Sri Lanka Navy