China's least-visible Flanker: the two-seat J-15S that seeded the J-15D
Ten years in the making: what the J-15S is actually for (Northern International Observation)
Watch on Bilibili
Estimates commonly place the embarked fighter force in the low twenties, supported by helicopters and a surface escort group.
China outfitted it with the Shenyang J-15, a large twin-engine fighter derived from the Flanker family.
In one December 2025 incident, a Chinese J-15 fighter jet taking off from the aircraft carrier Liaoning intermittently illuminated its radar on a Japanese F-15 conducting an airspace intercept.
Without the J-15 “Flying Shark,” China’s carrier program would have struggled to mature into the force it is today.
The current mix includes the J-15 fighter, future J-35 stealth fighter, and KJ-600 AEW aircraft.
the J-35 is supposed to replace the previous Shenyang aircraft, the J-15.
Taiwan's defence ministry released photographs showing eight J-15 fighter jets and three helicopters on the carrier's flight deck, a rare public glimpse of the vessel at operational capacity.
The J-15 remains the staple of China’s naval aviation.
J-15S is a two-seat variant in China's J-15 carrier-based fighter line.
The J-15S belongs to the J-15 Flying Shark family, China's carrier-based Flanker-derived naval fighter. The two-seat configuration supports training, mission development, and potentially more complex strike or electronic-warfare tasks within China's growing carrier aviation ecosystem.
The J-15S keeps the heavy carrier-fighter basis of the J-15 while adding a second crew station.
Adding a second crew member can help with workload in training, strike coordination, sensor employment, and electronic attack development. This matters for China because carrier aviation is still a demanding area where pilot training, deck operations, and mission specialization all impose steep learning curves.
J-15S is most important as part of China's effort to mature naval aviation rather than as a mass front-line type.
For readers, the J-15S page should connect the aircraft to China's broader carrier program. It is a variant that supports capability development, training, and specialist roles as the PLAN moves from ski-jump carrier operations toward more advanced carrier air wings.
The PLA Navy has never published J-15S specifications. Dimensions are inherited from the single-seat J-15 and all figures below are open-source estimates unless marked otherwise.
Publicly reported milestones. The J-15S has had almost no official coverage, so several dates rest on single-source reporting and analyst observation of photographs.
Shenyang Aircraft Corporation adapts the single-seat J-15 into a tandem two-seat airframe, following the Su-27UB/J-11BS pattern rather than the side-by-side Su-33UB demonstrator.
The first J-15S prototype is reported to have flown on 3 November 2012, alongside announcements of further J-15 derivatives.
A dedicated EW variant derived from the twin-seat airframe reportedly makes its first flight, confirming that the J-15S served as more than a trainer.
Photographs show wingtip EW pods, a reshaped radome consistent with an AESA radar, and deletion of the IRST sensor — features analysts attribute to work begun on the two J-15S prototypes.
The J-15S is reported to have entered PLAN service in small numbers roughly a decade after first flight — an unusually long gap for a Chinese fighter variant.
Chinese television footage shows an operational J-15S carrying number 46 in standard PLAN markings, unarmed and without weapons pylons, reportedly with the Naval Aviation University.
China publicly presents the J-15D at Airshow China as an in-service electronic warfare aircraft, marking the maturation of the twin-seat line the J-15S opened.
The J-15S resolved a design question China faced when it inherited the Soviet carrier-fighter lineage. Russia's Su-33UB demonstrator paired its second crew member with the pilot side by side, in the manner of the Su-34, which buys crew coordination at the cost of a wider, heavier forward fuselage. Shenyang instead took the conventional route already proven on the Su-27UB and J-11BS: a tandem cockpit under a stepped canopy, leaving the wing, undercarriage and folding mechanism essentially unchanged. That choice kept the aircraft compatible with the ski-jump decks of Liaoning and Shandong and preserved commonality with the single-seat fleet, but it forfeited the wide-console workspace a dedicated electronic-attack or long-range strike crew would prefer.
What the J-15S is actually for has never been officially stated, and the open-source evidence points in several directions at once. Assignment to the Naval Aviation University, the absence of weapons pylons in the only clear television footage, and a decade-long gap between first flight and limited service all argue for a carrier conversion trainer built in very small numbers. Yet analysts consistently note that the two prototypes doubled as testbeds for the J-15D electronic attack aircraft, and Chinese commentary has floated multirole strike and unmanned-teaming control as further uses. The most defensible reading is that the J-15S was a low-rate enabling airframe whose principal return came through its derivatives rather than through its own squadron service.
Strategically, the type is best understood as a transitional step now being overtaken. The J-15S is bound to STOBAR operations and cannot use the catapults of the Fujian, while the J-15T, the operational J-15D and the CATOBAR-capable J-15DT carry the twin-seat and electronic-attack concepts forward on a modernised airframe. Compared with the US Navy — where the two-seat F/A-18F is a fully combat-coded fleet type and the EA-18G a large operational force — China's twin-seat carrier line remains numerically marginal. Its significance lies less in the J-15S itself than in the fact that it gave the PLA Navy a domestic path to embarked electronic attack, a capability only two navies now field.
J-15 vs J-15S vs J-15D vs J-15T: how the variants differ (Lao Wei Shu Hu Kan)
Watch on BilibiliChina's J-15D two-seat electronic warfare fighter seen in the open (Military Coverage)
Watch on YouTubePLA Navy J-15D/J-15T at Airshow China 2024 (TopAviationVideo)
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