Are Medium-Altitude Long-Endurance UAVs Obsolete?
■ Zhao Wei, Hu Yongjiang, Yang Sen
Over the past two years, dozens of medium-altitude long-endurance (MALE) unmanned aerial vehicles—including the MQ-9 Reaper—have been shot down on battlefields around the world, prompting many to ask whether these platforms can still "hold their own" (尚能饭否).
At the same time, multiple countries continue to increase investment in the research, development, and deployment of this category of UAV. In November of last year, the upgraded MQ-9B completed its first anti-submarine patrol test; in April of this year, the first production aircraft of South Korea's domestically developed KUS-FS MALE UAV officially rolled off the assembly line; and shortly before that, Europe's first MALE UAV entered the prototype production stage.
So are MALE UAVs truly obsolete? Why are multiple countries bucking the trend and doubling down on investment? What circumstances will shape their future development? See this issue's analysis.
Related Types Suffer Repeated Losses
MALE UAVs generally refer to unmanned aerial systems operating at altitudes of 3 to 10 kilometers, with endurance of no less than 24 hours and substantial payload capacity, primarily tasked with reconnaissance and surveillance, communications relay, and precision strike missions. In the early 21st century, types such as the MQ-1 Predator and MQ-9 Reaper rose to prominence through battlefield performance and were once regarded as indispensable "eyes in the sky" of modern warfare.
In recent years, however, the status and role of MALE UAVs has been shaken. On Middle Eastern battlefields, at least 7 MQ-9 Reaper UAVs were shot down between March and April 2025 alone; following the escalation of U.S.-Israeli-Iranian hostilities, cumulative combat losses for that type had reached 24 aircraft as of April of this year. On the Russo-Ukrainian battlefield, the MQ-1C Gray Eagle was shot down on its very first combat deployment; the Orion UAV lost at least 2 aircraft within two days in September 2025; and confirmed video losses of the Bayraktar TB-2 alone reached 26 aircraft. In Africa, several Reaper UAVs have been shot down on the battlefield since the second half of 2025, and in Iraq the same type has been struck by missiles and suffered losses on multiple occasions. This string of data indicates that traditional MALE UAVs are becoming increasingly "fragile" in the modern battlefield environment.
[Caption: MQ-1C Gray Eagle UAV.]
[Caption: Bayraktar TB-2 UAV.]
The concentrated losses of MALE UAVs are not coincidental. From the perspective of the platforms themselves, in pursuit of long endurance these UAVs universally adopt a high-aspect-ratio fixed-wing configuration, resulting in slow flight speeds and poor maneuverability. The MQ-9 Reaper's cruise speed is only approximately 300 kilometers per hour; once locked by an air defense missile it is difficult to evade. The configuration accentuates the UAV's radar cross-section, and engine heat radiation is easily acquired by infrared seekers. To control weight, the airframes of these UAVs are largely constructed from lightweight composite materials, lacking necessary armor protection and self-defense systems. A more glaring shortcoming is that this category of UAV is highly dependent on satellite communications and data links, with weak resistance to electronic suppression; when subjected to jamming, navigation errors, communications interruptions, and even spoofing-induced forced landings are liable to occur.
Changes in the battlefield environment have further amplified these deficiencies. In the past, MALE UAVs could exploit their altitude advantage to conduct missions at ease in environments with weak air defense systems. Today, low-cost, miniaturized air defense weapons have proliferated rapidly, and medium altitude—even high altitude—is no longer a difficult-to-reach safe zone. The upgrading of electronic warfare capabilities means these platforms face the constant risk of having their signals cut or being spoofed.
The losses suffered by traditional MALE UAVs are fundamentally the result of a mismatch between a previous-generation product and the current battlefield environment. Their overall design was premised on a low-threat battlefield environment; when the modern battlefield has escalated to high-intensity confrontation, the same design has gradually shifted from an advantage to a liability, causing these platforms to become aerial targets hunted down and destroyed.
Why Are Countries Bucking the Trend?
If MALE UAVs were truly "obsolete," countries would inevitably reduce or even halt investment in this category. In fact, the opposite is true: multiple countries are continuing to advance the development of new variants while simultaneously upgrading existing UAVs of this type.
This seemingly contradictory phenomenon stems from the fact that MALE UAVs still possess strategic value—namely, the ability to "stand high, watch long, and link far" (站得高、看得久、联得远). They can avoid the majority of low-altitude fire threats, sustain continuous orbiting in the medium-altitude band of 3 to 10 kilometers, cover operational areas of tens of thousands of square kilometers, and precisely identify and locate targets. They can maintain uninterrupted all-weather surveillance over a reconnaissance area for extended periods, providing continuous and accurate intelligence support for command decision-making. When satellite communications are restricted and ground communications are disrupted, some MALE UAVs can also serve as data relay nodes linking dispersed combat units. This multifunctionality means countries will not retire this category at present, but will instead drive its iterative development through technological upgrades.
Currently, national investment in this area is primarily directed at improving the following capabilities.
Stealth modifications. Some new variants take a multi-pronged approach encompassing aerodynamic configuration optimization and the application of stealth materials, substantially improving UAV survivability in complex battlefield environments. The KUS-FS, for example, employs a protrusion-free blended wing-body design; its dorsal intake structure shields the engine fan blades; and after the airframe is coated with radar-absorbent material, its radar cross-section is smaller than that of types such as the MQ-9 Reaper. The Eurodrone produced under the Eurodrone Programme features a V-tail and stealthy external design, with more than 80 percent of the airframe composed of composite materials; both the intake and exhaust are fitted with radar-absorbent structures to reduce the corresponding signatures.
[Caption: Eurodrone (model).]
Upgrading sensing and defensive capabilities. Traditional MALE UAVs universally lack threat warning and countermeasure capabilities; new variants continuously enhance self-defense capability by constructing defensive systems. For example, the KUS-FS integrates an electronic warfare self-defense system equipped with an omnidirectional radar warning receiver; once locked on, it can trigger an alert, automatically dispense chaff and infrared decoy flares, and execute high-g evasive maneuvers. The Reaper and similar UAVs have also undergone targeted modifications; the electronic support pods they carry can passively detect enemy radar signals and generate threat maps, providing operators with real-time warning, while the guided munitions they carry also possess the capability to intercept aerial targets.
Enhancing anti-jamming and autonomous capabilities. Some new variants adopt anti-jamming communications technology and add navigation backups, progressively moving toward autonomous operation. The Eurodrone, for instance, employs a multi-redundant data link design with three communications modes—satellite communications, line-of-sight link, and airborne relay—and can automatically switch based on the battlefield electromagnetic environment to prevent mission failure caused by link interruption. MALE UAVs such as the MQ-9B have, in response to battlefield requirements, added GPS anti-jamming antennas and are also equipped with a directional infrared countermeasures system capable of actively jamming the seekers of certain missiles, further improving survivability.
Repositioning on the Future Battlefield
Whether upgraded MALE UAVs can reverse their survivability predicament remains to be verified in actual combat. What can be stated with certainty is that this category of UAV will not disappear, but will instead, through transformation, integrate deeply into the joint operations system in a more pragmatic and effective manner, becoming an important node within it.
Deployment emphasis shifting toward stand-off operations. Improvements in stealth and self-defense capability do not necessarily mean these platforms must return to high-intensity contested airspace. In the future, this category of UAV will in all likelihood execute missions in relatively safe areas, including stand-off zones, maximizing the platform's long-endurance loitering advantage. For example, the U.S. Marine Corps' MQ-9A integrates a broadband electronic reconnaissance pod capable of intercepting and collecting signals intelligence outside the adversary's air defense envelope. The MQ-9B, by integrating stand-off precision strike weapons, ensures mission accomplishment while safeguarding its own safety.
Capability boundaries extending into non-strike domains. As intelligent and information-based technologies continue to iterate and upgrade, the core capabilities of this category of UAV are expanding deeply into support and sustainment domains. The KUS-FS has specifically reinforced its reconnaissance, surveillance, and electronic defense capabilities, enabling it to capture battlefield dynamics over extended periods and transmit data in real time, providing intelligence support for command decision-making. The MQ-4C Triton undertakes long-range maritime communications relay missions; some modified variants also carry electronic jamming payloads capable of suppressing enemy radar and communications systems to a certain degree, opening safe corridors for friendly forces.
[Caption: KUS-FS medium-altitude long-endurance UAV.]
Battlefield role transitioning toward networked nodes (体系化节点). On the future battlefield, the limitations of single-platform operations will become increasingly pronounced, and the role of this category of UAV will shift from independent combat unit to critical node within the system. Some countries have already initiated cooperative combat trials involving electronic warfare aircraft, manned combat aircraft, and this category of UAV, using the UAVs to provide target cueing and data relay for manned platforms. For example, after the MQ-9A is fitted with a communications pod, it can link various combat units through network extension and data distribution functions, improving system-of-systems operational effectiveness through an integrated information link. The KUS-FS UAVs already fielded with the Republic of Korea Air Force's reconnaissance wing will serve as ISR nodes within the system, providing information support to other combat units.
Mission scope expanding toward the maritime domain. In executing missions such as maritime domain awareness and anti-submarine patrol, MALE UAVs are a key option for compensating for insufficient manned aircraft numbers, and may in the future become an important force underpinning maritime operational systems. The Eurodrone was, from the research and development stage, aimed at long-cycle missions such as anti-submarine warfare and wide-area maritime surveillance, with an autonomous flight endurance of up to 40 hours. The planning for South Korea's KUS-FS also explicitly focuses on maritime patrol missions to achieve comprehensive coverage of near-sea and far-sea areas and enhance maritime domain control capabilities. This indicates that the vast ocean is becoming a new primary battlespace for MALE UAVs.
In sum, the repeated losses suffered by MALE UAVs do not mean they will exit the historical stage; rather, through repositioning, they will integrate into the joint operations system in a posture more closely aligned with the demands of the modern battlefield. In the future, accompanied by technological upgrades and the tempering of actual combat, MALE UAVs may well take on new vitality and write new chapters.
(Images for this page provided by: Yang Zhou)