The recordWhat this system is, where it comes from, who operates it and which of Vigil’s modules it is relevant to — with the evidence each of those rests on.
Record
Conflict relevance
This is the catalogue's single record for this system. It is relevant to the module below; each module's Force Atlas shows how it is used there.
Operators
People's Republic of China: Air force and naval aviation
Battlefield role
Airborne early warning and air battle management: wide-area detection of aircraft and surface vessels, and control of the aircraft operating with it. In the activity Taiwan reports, its presence is the difference between aircraft flying near the island and aircraft operating as a coordinated package with a shared picture.
Strengths
A fixed, three-faced active electronically scanned array rather than a rotating disc, produced in enough numbers to be routinely available, and operated by both the air force and naval aviation. Its role in extending the picture over water is what allows PLA activity east of Taiwan — the trend line of the past four years — to be conducted coherently at that distance.
Limitations
Large, slow, unstealthy and dependent on runways; the same properties that make Taiwan's own airborne early-warning aircraft an early target apply here. Endurance at distance from the mainland depends on the tanker fleet, which is a separate and smaller constraint. Nothing about the aircraft's presence in a daily detection count is evidence about intent.
Campaign relevance
Derived: a participant organisation in these campaigns carries a typed equipment association with this system. That is not the same as documented use of the system in the campaign itself.
- Sustained pressure below the threshold Intensifying since 2020
via PLA Air Force (Documented, high confidence)
Visual identification
A four-turboprop high-wing transport airframe carrying a large fixed circular radome above the fuselage — the radome does not rotate, which distinguishes it from earlier types, and the four propellers distinguish it from the jet-based aircraft in the same role.
Documented conflict use
Routinely identified by type in Taiwan's published daily detections of PLA aircraft, including in composite packages — on 25 May 2026 Taiwan's defence ministry identified a KJ-500 operating alongside fighters and an aerial refueller in coordination with naval vessels, which is the pattern the type is usually seen in. These are Taiwanese detections published by Taiwan, and Vigil reads them as one party's reporting rather than as independent measurement; no routes, orbits or dispositions are published.
Branch & service operators
- PLA Air Force Documented
Assessed as of2026-09Last reviewed2026-09-09