HİSAR-A vs HİSAR-O vs HİSAR-U: Türkiye’s Air Defense Family Explained

The HİSAR family is the indigenous backbone of Türkiye’s low- and medium-altitude air defence — short-range HİSAR-A, medium-range HİSAR-O, and the long-range HİSAR-U that ultimately evolved into the SİPER programme. Here is the complete 2026 comparison: ranges, altitudes, seekers, launch platforms and where each system fits in Türkiye’s Steel Dome architecture.

The HİSAR Programme: One Family, Three Tiers

HİSAR (Turkish for “castle” or “fortress”) is the multi-tier surface-to-air missile programme jointly developed by Aselsan and Roketsan with TÜBİTAK SAGE under the Defence Industries Presidency. The programme was conceived as Türkiye’s answer to the U.S. Hawk and Patriot families and the European SAMP/T, with three layered variants — short-range HİSAR-A, medium-range HİSAR-O and the originally planned long-range HİSAR-U — covering threats from low-altitude drones up to high-altitude aircraft and cruise missiles.

In practice, the long-range HİSAR-U requirement grew into a separate, more ambitious project and was rebadged as the SİPER long-range system. The active HİSAR family today therefore consists of HİSAR-A (and its upgraded HİSAR-A+ variant) and HİSAR-O (and HİSAR-O+), with SİPER handling the long-range layer.

Side-by-Side Comparison

The table below summarises the headline performance figures of the active HİSAR family. Where two values appear (e.g. 25/40 km), the first is the IIR-seeker variant and the second the longer-range RF-seeker variant.

HİSAR-A: The Short-Range Layer

HİSAR-A is the entry-tier SAM in the family — a short-range, low-altitude system designed for point defence of critical installations and forward troop concentrations. The upgraded HİSAR-A+ extends the original’s envelope to roughly 15 km range and 8 km altitude. The interceptor is a single-stage missile with an imaging infrared (IIR) seeker, vertically launched from a wheeled launcher with mid-course command updates from the battery radar.

Within Steel Dome, HİSAR-A occupies the SHORAD layer, defending against aircraft, helicopters, cruise missiles and UAVs at short ranges. Its mobility and short emplacement time make it a natural manoeuvre-force protection asset, where it complements the very-short-range Sungur and GÖKSUR systems.

HİSAR-O: The Medium-Range Layer

HİSAR-O is the family’s medium-range variant — a longer missile with greater range, higher altitude and a more capable seeker. The base HİSAR-O reaches engagement ranges over 25 kilometres and altitudes above 15 kilometres using an imaging infrared (IIR) seeker. The improved HİSAR-O+ variant adds a radio-frequency (RF) seeker that extends the engagement envelope to 40+ km, giving the system genuine area-defence capability against cruise missiles and aircraft.

HİSAR-O completed its final pre-mass-production tests in 2025 and is now in full serial production. Within Steel Dome, HİSAR-O is the MR-SAM layer — the system that fills the engagement gap between the short-range HİSAR-A and the long-range SİPER.

HİSAR-U → SİPER: Why the Long-Range Variant Became Its Own Programme

The original HİSAR programme architecture included a long-range HİSAR-U variant. As the long-range requirement grew — driven in part by the need to defeat tactical ballistic missiles and the loss of access to certain Western long-range systems — the project evolved into something substantially larger than the rest of the HİSAR family: a heavier missile, a larger radar, and a more demanding command-and-control envelope. In recognition of those structural differences, HİSAR-U was rebadged as the SİPER long-range air defence system and given its own dedicated programme structure.

SİPER’s first variant (SİPER-1) entered Turkish Armed Forces service in 2026 and was integrated into Steel Dome. The ballistic-missile-defence variants (SİPER-A, SİPER-4) were contracted under the November 2025 US $6.5 billion Steel Dome mega-contract.

How the HİSAR Family Plugs into Steel Dome

The defining feature of the HİSAR family in 2026 is not any one variant — it is the way all of them feed into the Steel Dome integrated air-defence picture. A target detected by an Aselsan EIRS surveillance radar can be passed to a HİSAR-A battery for short-range engagement, or to a HİSAR-O+ battery for medium-range engagement, or to a SİPER battery for long-range engagement, depending on geometry, threat type and target priority. Steel Dome’s AI-assisted battle-management layer makes that assignment automatically, in seconds.

Export Prospects

HİSAR-O+ is the most export-attractive variant of the family today — a medium-range SAM with a mature production status, dual-seeker flexibility and integration with the wider Turkish defence catalogue. Public interest has been reported from multiple Middle Eastern and African customers. Aselsan and Roketsan have publicly stated their intention to position HİSAR-O+ as a competitor in the global medium-range SAM market against systems like the U.S. NASAMS, the Israeli SPYDER and the European IRIS-T SLM.

Frequently Asked Questions

What is the difference between HİSAR-A and HİSAR-O?

HİSAR-A is short-range (up to ~15 km, 8 km altitude). HİSAR-O is medium-range (25+ km IIR / 40+ km RF, 15+ km altitude).

What happened to HİSAR-U?

HİSAR-U was the originally planned long-range variant. It grew into a much larger programme and was rebadged as SİPER, which is now in Turkish Armed Forces service.

Who builds the HİSAR missiles?

Aselsan and Roketsan jointly, with TÜBİTAK SAGE, under the Defence Industries Presidency.

What is the seeker on HİSAR-O+?

HİSAR-O+ adds a radio-frequency (RF) seeker option to the base imaging infrared (IIR) seeker, extending the engagement range to 40+ km.

How does the HİSAR family fit into Steel Dome?

HİSAR-A fills the SHORAD layer; HİSAR-O fills the MR-SAM layer; SİPER (formerly HİSAR-U) is the LR-SAM / BMD layer. All three plug into the Steel Dome integrated picture.

Conclusion

The HİSAR family — together with the SİPER programme that grew out of it — gives Türkiye a sovereign, layered surface-to-air missile capability from short range up to long-range BMD, all built around domestic radars, interceptors and command-and-control. Inside Steel Dome, HİSAR-A and HİSAR-O are the workhorse layers that handle the bulk of low- and medium-altitude engagements.

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Sources

Hisar (missile family) — Wikipedia — https://en.wikipedia.org/wiki/Hisar_(missile_family)

HISAR-A+ Low-Altitude Air Defence Missile System — Army Technology — https://www.army-technology.com/projects/hisar-a-low-altitude-air-defence-missile-system/

Türkiye successfully tests HİSAR-O air defense system — Army Recognition — https://www.armyrecognition.com/news/defense-web-tv/tuerkiye-successfully-tests-hisar-o-air-defense-system-with-live-intercept-in-missile-shield-effort

HISAR-O Medium Altitude Air Defence Missile System — Army Technology — https://www.army-technology.com/projects/hisar-o-medium-altitude-air-defence-missile-system/

HİSAR-O Air Defense System Completes Final Tests — Army Recognition (2025) — https://www.armyrecognition.com/news/army-news/2025/hisar-o-air-defense-system-completes-final-tests-before-mass-production-enhancing-tuerkiyes-defense-autonomy

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