OVERVIEW: The SS 711 *Hai Kun* is a conventional diesel-electric submarine in service with the Taiwanese Navy, commissioned in 2025. It represents a significant modernization effort for Taiwan's submarine force.

DETAILS: The *Hai Kun* class represents Taiwan's first domestically produced submarine, marking a major milestone in the country's defense industry and strategic autonomy. The program was initiated to address the aging of Taiwan's existing submarine fleet and to bolster its defense capabilities against potential adversaries. The design likely incorporates elements from various international sources, reflecting the challenges in acquiring advanced submarine technology and expertise. The *Hai Kun*'s development philosophy prioritizes a balance between advanced sensor capabilities, stealth characteristics, and effective anti-ship weaponry, enabling it to operate effectively in the complex and contested waters surrounding Taiwan. Significant investment has been made in quieting technology to reduce the submarine's acoustic signature.

The *Hai Kun*'s primary roles encompass anti-submarine warfare (ASW), anti-surface warfare (ASuW), and intelligence gathering. Its advanced sensor suite allows it to detect and track both surface and subsurface targets at extended ranges. In an ASW role, the *Hai Kun* is designed to protect Taiwan's sea lanes and counter enemy submarine deployments. The submarine also possesses the capability to engage surface combatants with torpedoes, providing a potent ASuW capability. Its intelligence gathering capabilities contribute to Taiwan's maritime domain awareness, providing critical information for defense planning and operations.

The *Hai Kun*'s sensor suite is comprehensive, reflecting its multi-mission capabilities. The Type 2026 sonar, coupled with the AR-700S5 intercept receiver, provides advanced acoustic detection and analysis capabilities. The TSM 2272 Octopus sonar system, including its DSUV 2H towed array and DUUA 2D flank array, significantly enhances its ASW capabilities by extending detection ranges and providing accurate target localization. The ZW.07 navigation system, a variant of the Decca 1001, ensures precise navigation and positioning. The TSM 2255 fire control system integrates sensor data and weapon systems for effective targeting and engagement. The DUUG 5 and DUUG 6 [M5] underwater communication systems enable secure communication with other naval units. The inclusion of both optical and LLTV periscopes provides versatile observation capabilities, while the signal ejector allows for secure communication and decoy deployment.

SPECIFICATION: Length: 70.0 m || Beam: 8.4 m || Draft: 6.6 m || Disp: 2700 t

SENSORS: Type 2026 || AR-700S5 || TSM 2272 Octopus [DSUV 2H + DUUA 2D] || ZW.07 [Decca 1001] || TSM 2255 || DUUG 5 || DUUG 6 [M5] || Generic Submarine Periscope, Optical || Generic Submarine Periscope, LLTV

ARMAMENT: Signal Ejector || 533mm TT