Type 039B

Type 039B
Name	Type 039B
Other names	Type 039B-class submarine
Builders	China Shipbuilding Industry Corporation; Jiangnan Shipyard
Operator	People's Liberation Army Navy
Class before	Type 039A
Displacement	approx. 3,000–3,500 tonnes (submerged)
Length	~76 m
Propulsion	air-independent propulsion (AIP); diesel-electric
Speed	submerged: ~20–25 kn
Armament	torpedoes; anti-ship cruise missiles; mines
Commissioned	early 2010s (first boats)
Status	in active service

Type 039B

Type 039B is a conventionally powered submarine class fielded by the People's Liberation Army Navy in the early 2010s. It represents an incremental evolution from earlier Chinese diesel-electric designs toward improved air-independent propulsion endurance, quieter signatures, and enhanced littoral strike capabilities. The class has been associated with a broader modernization trend within the People's Liberation Army naval expansion and regional force projection initiatives.

Design and development

The design and development process drew on experience from the preceding Type 039A program, development centers such as the Wuhan Naval Shipbuilding Research Institute, and industrial entities including China Shipbuilding Industry Corporation and Harbin Shipyard. Influences cited in procurement analyses reference technologies demonstrated by submarines from Japan Maritime Self-Defense Force, Republic of Korea Navy, and export examples like those operated by the Royal Thai Navy and Pakistan Navy. Design priorities emphasized reduced acoustic signature improvements influenced by studies of Kilo-class submarine quieting measures, survivability lessons from Soviet Navy designs, and endurance improvements comparable to experimental Stirling engine AIP systems fielded by Swedish Navy programs. Political drivers included maritime disputes involving East China Sea and South China Sea features, and doctrinal shifts in the People's Liberation Army Navy toward anti-access/area-denial (A2/AD) concepts discussed alongside thinkers linked to China Institutes of Contemporary International Relations analyses.

Technical specifications

The platform combines a teardrop hull form and modular sections reflecting influence from both domestic designs and observed features on Scorpène-class submarine exports. Displacement and dimensions place it between smaller coastal types like those in service with the Vietnam People's Navy and larger conventional types used by the Indian Navy. Propulsion centers on diesel-electric machinery augmented by an air-independent propulsion module arguably inspired by technology exchanges and licensed production routes, with auxiliary systems comparable to systems used on Type 212 prototypes examined by Chinese engineers. Performance estimates point to submerged speeds in the 20–25 knot range, endurance measured in weeks with AIP, and a test depth aligned with norms reported for contemporary conventional submarines. Armament fitting includes 533 mm torpedo tubes compatible with torpedoes and anti-ship cruise missiles similar in role to those of the French Navy and Royal Navy export packages; internal layout supports mine-laying and special forces deployment reminiscent of accommodations in some Kilo-class submarine variants.

Sensors and combat systems

Combat systems integrate indigenous and imported sensor sets, drawing on sonar and electronic support measures developed at research facilities such as the National University of Defense Technology laboratories and procurement agencies comparable to the China Shipbuilding Industry Corporation. Hull-mounted sonar arrays and flank arrays reflect parallel evolution to systems deployed by the Japanese Maritime Self-Defense Force and Republic of Korea Navy, while towed arrays and non-acoustic sensors bring capabilities nearer to those fielded on modern conventional boats in Turkish Navy and Hellenic Navy service. Fire-control and combat management software exhibits lineage traceable to subsystems evaluated through cooperative programs with domestic naval institutes and analogues in systems used by the Russian Navy, blending weapon control functions with navigation suites similar to those aboard contemporary private-sector retrofit efforts.

Variants and upgrades

Incremental improvements yielded batches differentiated by AIP type, electronics, and acoustic treatments; later hulls incorporated quieter machinery mounts and revised propulsor designs mirroring research published by engineers affiliated with the Chinese Academy of Sciences and naval universities. Upgrade paths identified in defense analyses include retrofits for extended-range anti-ship cruise missiles inspired by systems operated by the Hellenic Navy and integration of advanced battery technologies paralleling developments tracked in Japan and South Korea. Proposals discussed within industrial roadmaps referenced cooperative ventures and licensing approaches used previously between China Shipbuilding Industry Corporation and foreign OEMs to accelerate assimilation of quieter shafts, improved anechoic coatings, and modular mission bays.

Operational history

Boats entered service amid expanding People's Liberation Army Navy submarine flotillas assigned to the North Sea Fleet, East Sea Fleet, and South Sea Fleet areas of responsibility. Deployments emphasized patrols in contested waters adjacent to features like Senkaku Islands (Diaoyu Islands) and maritime approaches to Hainan Island; exercises included anti-surface warfare and anti-submarine warfare training alongside surface units and naval aviation elements comparable to task group activities documented in regional naval exercises. Occasional port visits and signaling operations have been interpreted in diplomatic analyses alongside events such as ASEAN maritime dialogues and bilateral talks with regional partners.

Export and foreign interest

Interest from foreign navies has been reported in open-source defense trade analyses with potential customers in regions including Southeast Asia and Africa, paralleling earlier Chinese submarine export successes with countries like Pakistan and Bangladesh. Negotiations and transfer concepts have been compared to prior deals involving the Scorpène-class submarine and licensed builds that engaged shipyards in South Asia. Export prospects hinge on strategic ties with state customers such as those involved in trilateral initiatives and bilateral defense cooperation frameworks, and on comparative assessments against offerings from Rosoboronexport, Naval Group, and other major suppliers.

Category:Submarines of the People's Liberation Army Navy