Lockheed Martin has quietly unveiled Lamprey, a highly autonomous underwater vehicle that rides hidden on larger vessels before detaching to conduct long, complex missions on its own. Behind the odd “parasite submarine” label lies a serious shift in how navies plan to use the deep ocean.
A parasite-style submarine that hitchhikes across the oceans
The Lamprey Multi-Mission Autonomous Undersea Vehicle (MMAUV) borrows its name and concept from the lamprey and remora, fish that latch onto bigger animals to travel long distances with little effort.
Instead of sailing from base under its own power, Lamprey attaches physically to a surface ship or a crewed submarine. It then crosses oceans as an invisible passenger, without draining its batteries.
Lamprey is designed to “hitchhike” on allied ships, arrive in theatre with full batteries, detach quietly, and start work immediately.
Most existing autonomous underwater vehicles (AUVs) have to spend a large part of their energy budget simply reaching their patrol zone. That limits how long they can stay on station or how far they can range once there. Lamprey flips that logic: distance is covered by the host vessel, endurance is reserved for the mission.
This hitchhiking concept also complicates tracking. An adversary might see only a single submarine or frigate on their screens, while a hidden Lamprey hangs underneath, waiting to separate and vanish into the depths.
Hidden hydrogen power for long underwater persistence
A slow but steady onboard refuelling system
Once deployed, Lamprey does not rely solely on its starting battery charge. The vehicle carries onboard systems that generate hydrogen to recharge its batteries over time.
This is not a fast “plug in and refill” setup. It is more akin to a trickle-charging system engineered for persistence rather than speed.
The goal is not quick sprints, but the ability to lurk on the seabed or in mid‑water for weeks, with minimal support.
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In practical terms, that means Lamprey can be sent to surveil a submarine choke point, shadow an undersea cable, or sit near an offshore gas pipeline for extended periods. Every hour spent drifting quietly can be partially offset by slow energy regeneration, stretching missions well beyond traditional battery limits.
Mission-first design: the hull serves the payload
A modular interior for very different jobs
Lockheed Martin has built Lamprey around a core principle: the mission defines the payload, not the other way around. The internal bay uses an open, modular architecture. Equipment can be swapped in and out depending on tasking.
Potential payloads include:
- Lightweight anti-submarine torpedoes or loitering munitions
- Intelligence, surveillance and reconnaissance (ISR) sensor suites
- Electronic warfare and jamming modules
- Deception systems and acoustic decoys
- Launch tubes for small aerial drones that can break the surface and provide overhead coverage
This “plug-and-play” logic turns Lamprey into a kind of underwater multi-tool. The same chassis might one day monitor traffic in a strategic strait, and later be reconfigured to deploy decoys or carry out precision attacks on seabed infrastructure.
One platform can watch, mislead, harass or hit, simply by changing the internal payload modules.
Two operational roles on a single platform
Access and denial in the same hull
Engineers have framed Lamprey around two big categories of operations that navies increasingly care about.
First, “assured access”: getting into contested waters and staying there.
- Persistent surveillance of strategic areas
- Covert intelligence collection near sensitive coasts
- Discreet presence in heavily monitored zones
- Precision strikes if a target of opportunity appears
Second, “maritime denial”: limiting the opponent’s freedom of movement and information.
- Jamming and electronic disruption in key chokepoints
- Deployment of acoustic decoys to confuse enemy sonar
- Targeted attacks against sensors or seabed nodes
- Occupation and monitoring of key stretches of the sea floor
Instead of fielding several narrowly specialized drones, navies could adapt Lamprey to shift between these postures as the theatre changes. That flexibility is particularly attractive in crowded maritime areas where threats can move quickly from espionage to sabotage or even open conflict.
A direct answer to the militarisation of the seabed
From communication cables to energy infrastructure
For decades, the deep ocean has quietly filled up with critical assets: transoceanic fibre‑optic cables, seabed sensors, gas and oil pipelines, power interconnectors and data links to offshore wind farms. These installations form the backbone of global trade, energy flows and internet connectivity.
As tensions grow between major powers, those hidden networks look less like neutral infrastructure and more like potential targets. Lamprey is clearly intended for this new phase.
Seabed cables, energy lines and sensor networks are no longer just civilian assets; they are now battleground terrain.
In practice, that could mean placing small listening devices alongside cables, monitoring for tampering, or quietly mapping rival infrastructure. Conversely, it might involve cutting, jamming or sabotaging an adversary’s undersea nodes during a crisis.
Lockheed Martin’s self-funded gamble
Why the largest arms firm paid out of pocket
Perhaps the most telling detail: Lamprey has been funded internally by Lockheed Martin, which reported around €63 billion in revenue in 2025. Instead of waiting for a long specification process from the US Navy or another government, the company has built the concept largely with its own money.
That signals a sense of urgency. Competitors are also rushing out new AUV designs, all betting that unmanned systems will dominate the next wave of undersea competition.
| Company | System | Type | Main missions | Maturity |
| Lockheed Martin | Lamprey MMAUV | Multi-mission autonomous UUV | Intelligence, maritime denial, strike, seabed deployment | Advanced concept |
| Boeing | Orca XLUUV | Large, long-endurance UUV | Long-range missions, heavy payloads | Pre‑operational |
| Anduril Industries | Collaborative UUV concepts | Distributed autonomous drones | Surveillance, saturation, information warfare | Rapid development |
| Saab | AUV62 family | Modular AUVs | Mine warfare, training, ISR | Operational |
| Huntington Ingalls | Heavy integrated AUVs | Submarine-interoperable drones | Support to crewed subs, special missions | Development |
| L3Harris | Endurance AUVs | Acoustic surveillance drones | Detection, persistent monitoring | Operational |
| China (CSSC-linked) | Coastal AUV prototypes | Autonomous submarines | Littoral surveillance, infrastructure security | Limited deployment |
Each of these programmes reflects a different strategic choice: fewer, larger and more capable drones like Orca; or many smaller, cheaper units in networked swarms, as favoured by Anduril and several Chinese projects. Lamprey positions itself somewhere in between, as a highly capable but still relatively compact parasite vehicle.
How navies might actually use a parasite submarine
Realistic scenarios from peacetime to crisis
In peacetime, a navy could send a frigate across the Atlantic with one or two Lampreys attached. Near a vital cable landing point or offshore energy hub, the drones would detach, sink to operating depth and fan out. One might map the local seabed and log the acoustic signatures of passing ships. Another could inspect known infrastructure for signs of tampering.
During a crisis, a crewed submarine might covertly approach an enemy coastline with a Lamprey clamped on. Once in place, it could release the drone to plant decoys, jam a key sensor line or simply sit motionless, listening. If tensions escalate further, the same platform could deliver small torpedoes against seabed junction boxes or unmanned enemy nodes.
The same machine that quietly watches in peacetime can, with a different payload and orders, sabotage or strike in a crisis.
Key terms and risks behind the technology
What “multi-mission” and “autonomous” really mean
Two terms recur around Lamprey: “multi-mission” and “autonomous”. Multi-mission is mostly about hardware flexibility. Navies want to reduce the number of separate platforms they need to buy, maintain and crew. A single base vehicle that can do reconnaissance one month and act as an electronic warfare asset the next helps with budgets and logistics.
Autonomous, in this context, refers to more than simple autopilot. These drones are expected to navigate complex underwater environments, avoid obstacles, respect no-go zones and pursue goals while remaining very hard to detect. Human operators still set missions and rules of engagement, but the vehicle must make many decisions locally, sometimes with limited communication links.
Benefits, vulnerabilities and escalation risks
From a military perspective, Lamprey-type systems offer obvious advantages. They reduce the risk to human crews, fill gaps where crewed submarines are scarce, and provide near-continuous presence in areas that would otherwise be too costly to patrol.
They also introduce vulnerabilities and escalation risks. A parasite drone can be captured, tampered with or spoofed. If an unmanned system damages another state’s infrastructure, responsibility and intent may be harder to prove, raising the risk of sudden retaliation. There is also the long-term issue of clutter: as more states deploy seabed systems, the deep ocean risks becoming a mess of abandoned hardware, sensors and munitions.
For now, Lamprey remains a prototype concept presented by the world’s largest arms manufacturer. Yet the underlying idea is already shaping naval planning: in future conflicts, the most consequential submarines may be the ones no one ever sees on sonar, clamped quietly to the hulls of bigger ships, waiting for the order to let go.