Learn what the Boeing MQ-25 Stingray is, how its probe-and-drogue refuelling works, and why the US Navy needs an uncrewed carrier tanker.
In real-world aviation, the Boeing MQ-25 Stingray is an uncrewed, carrier-based tanker aircraft designed for the US Navy. Its main job is to refuel carrier aircraft in flight, extending the range and endurance of the F/A-18E/F, EA-18G and F-35C while reducing reliance on fighter-based “buddy tanking”.
What missions is the MQ-25 designed to perform?
Aerial refuelling is the MQ-25’s primary mission. It is intended to launch from an aircraft carrier, meet other carrier-air-wing aircraft at a planned refuelling point and transfer fuel before returning for an arrested landing.
- Extend the combat radius of carrier-based fighters.
- Give aircraft more time on patrol or at a holding point.
- Keep more Super Hornets available for strike, escort and air-defence missions instead of using them as tankers.
- Reduce the need to expose an aircrew to a routine support mission.
The programme has also been associated with intelligence, surveillance and reconnaissance support, as well as the Navy’s wider introduction of uncrewed aircraft to carrier operations. Those functions are secondary to its defining tanker role.
How does the MQ-25 refuel other aircraft?
The Stingray uses the probe-and-drogue method familiar to US Navy aviation rather than the rigid flying boom normally associated with large US Air Force tankers.
- Launch: the MQ-25 departs the carrier using its catapult-compatible nose gear and follows a planned tanker mission.
- Deploy the hose: an underwing aerial-refuelling store reels out a flexible hose ending in a basket-shaped drogue.
- Make contact: the receiving aircraft approaches from behind and inserts its refuelling probe into the drogue.
- Transfer fuel: fuel flows while both aircraft maintain the required position and speed.
- Recover: the hose is retracted and the MQ-25 returns to the carrier for an arrested landing.
Our explanation of boom and probe-and-drogue refuelling covers the practical differences between the two systems.
Why does the US Navy need an uncrewed tanker?
Carrier air wings have often used an F/A-18E/F fitted with an external refuelling store for buddy tanking. That works, but every Super Hornet assigned to tanking is unavailable for its main combat role, while tanker sorties also consume fatigue life and maintenance hours on an expensive strike fighter.
| Refuelling option | Main advantage | Main limitation |
|---|---|---|
| MQ-25 Stingray | Dedicated carrier-based tanker that does not require an onboard crew | Requires carrier integration, control systems and its own maintenance support |
| F/A-18E/F buddy tanker | Can operate directly with the carrier air wing using an existing fighter type | Uses a combat aircraft, pilot and airframe hours for a support task |
| Land-based tanker | Can carry considerably more fuel | Depends on suitable bases and may be unable to support operations far from land |
Dedicated carrier tankers are not a new idea: our EKA-3B Skywarrior tanker example provides historical simulator context. What distinguishes the MQ-25 is combining that support mission with an uncrewed aircraft designed for modern carrier decks.
For receiver-aircraft context, the FS2004 F/A-18E Super Hornet model represents one of the principal aircraft whose range the Stingray is intended to extend.
How much extra range does the MQ-25 provide?
There is no single range increase that applies to every mission. The useful fuel available to receivers changes with the Stingray’s launch weight, distance to its tanker orbit, time on station, weather, recovery plan and required fuel reserves.
A common mistake is to treat a quoted fuel-offload figure as a fixed aircraft specification. An offload figure only makes sense when its distance and mission profile are included; fuel delivered close to the carrier cannot be compared directly with fuel delivered hundreds of nautical miles away.
Is the MQ-25 an armed combat drone?
No. The MQ-25’s defined primary role is aerial refuelling, not autonomous air-to-air combat or strike missions. Its shape and uncrewed configuration sometimes lead to it being described as a stealth combat drone, but that misrepresents why the Navy selected and is developing the aircraft.
“Uncrewed” also does not mean uncontrolled. Human operators assign and monitor the mission, while automated flight and carrier-integration systems handle much of the aircraft’s operation. Carrier deck crews must still direct its movement safely among people, aircraft, catapults and arresting equipment.
What has the MQ-25 demonstrated in flight testing?
Boeing’s T1 demonstrator conducted aerial-refuelling trials in 2021 with an F/A-18F Super Hornet, E-2D Advanced Hawkeye and F-35C Lightning II. It also underwent carrier-deck handling trials, demonstrating that an aircraft without an onboard pilot could be directed around the confined flight deck.
Those tests proved key parts of the concept, but a successful demonstrator sortie is not the same as routine fleet service. Operational use requires production-representative aircraft, carrier launch and recovery integration, receiver certification, maintenance support, trained operators and formal Navy acceptance.