Lemvos LM450 uncrewed surface vessel underway offshore, seen from the air

LM450

Multirole uncrewed surface vessel

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The LM450 is a compact, multirole USV with omnidirectional thrusters for agile, redundant propulsion. Its modular deck supports sonars, ROV/AUV launch systems and UAV docking, enabling environmental monitoring, defence and security work, and seafloor mapping. It operates remotely or semi-autonomously via satellite or 5G.

330 kg

Maximum payload

30 days

Continuous mission without docking

6 months

Unattended with a Lemvos docking station

Sea state 6

Survival condition

Key features

Built for redundancy and endurance

  • Twin independent outboard drivesRedundant Propulsion

    Two independent 5 kW omnidirectional thrusters: the vessel stays under control if one drive is lost.

  • Self-righting hullSelf-Righting Hull

    An HDPE displacement hull that rights itself after a knockdown, rated to sea state 6.

  • GNSS satellite positioningPrecision GNSS

    Positioning accurate enough to hold a survey line and to dock without a hand on the controls.

  • Redundant communication antennasRedundant Communication

    Starlink, 4G/5G, Iridium and Wi-Fi, so losing one link does not mean losing the vessel.

  • Payload deployment from the open deckFlexible Payload Bay

    A 1056 × 350 × 500 mm internal bay with 230 VAC and 48/24/12/5 VDC supplies.

  • Long-endurance operationLong Endurance

    30 days continuous on the diesel-solar hybrid, or 34 hours on battery alone.

  • Hybrid power: battery, solar and fuelDiesel-solar hybrid

    A 3.5 kW diesel generator, 350 W of solar and a 12.8 kWh battery working as one system.

  • Uncrewed vessel with remote command linkSemi-Autonomous

    Runs its mission on board under Ground Control supervision, with an operator able to take over at any time.

Hull and propulsion

Self-righting hull, twin independent drives

The self-righting HDPE displacement hull is rated for operation up to sea state 6, and two independent omnidirectional thrusters keep the vessel under control even if one drive is lost.

Lemvos LM450 uncrewed surface vessel during winter sea trials

Payload configurations

Multipurpose USV platform

One USV, many missions. The LM450 deck and payload bay are designed to be reconfigured for the job at hand.

LM450 USV with a UAV landing and docking pad mounted on the aft deck

Deployment & recovery of UAVs

Supports the deployment of small uncrewed aerial surveillance systems, providing a reliable hub for both power and communications.

Logistics

Made for ease of transport

The LM450 is designed to fit inside a standard 20-ft shipping container, making transport simple and cost-effective. Its compact footprint and modular design mean it can be shipped globally using conventional freight services, reducing logistics complexity and enabling rapid deployment anywhere in the world.

LM450 uncrewed surface vessel loaded inside a standard 20-foot shipping container
LM450 uncrewed surface vessel packed for transport with its cradle

In operation

Autonomous docking in action

The LM450 docks and undocks from the DockMaster station without human intervention, recharging at 3 kW between sorties.

Product resources

Specifications, photos and files

Full technical specifications, product photography and the current documentation.

LM450 at a glance

LM450 technical specifications, column 1 of 2
General
Hull length4800 mm
Hull width1800 mm
Draft440 mm — depending on configuration
Height2400 mm (mast up)
Displacement630 kg — dry mass excluding payload
HullDisplacement type & self-righting
Hull materialHDPE
Top speed5.5 kts (10 km/h)
Maximum operating sea state6 (Beaufort scale)
Propulsion2 × 5 kW electric omnidirectional thrusters
Remote dockingDockMaster with 3 kW charging
Endurance
Maximum endurance without human intervention6 months — requires a Lemvos DockMaster station
Maximum continuous mission duration without docking30 days — diesel-solar hybrid
Single-mission endurance, pure electric34 hours
LM450 technical specifications, column 2 of 2
Power & energy
Power generation3.5 kW diesel generator + 350 W solar
Fuel capacity170 l diesel — additional range extender tanks available
Battery capacity12.8 kWh — additional capacity available for the pure electric version
Control & connectivity
ControllerDual-redundant Lemvos AutomatePro
Situational awarenessCamera, AIS receiver, sonar, radar
ConnectivityStarlink, 4G/5G, Iridium, Wi-Fi
On-board processor moduleNVIDIA Jetson Orin — integrated in AutomatePro
Control interfaceLemvos Ground Control Station (PC based)
Payload
Maximum payload330 kg — depending on configuration
Payload bay voltages230 VAC, 48 VDC, 24 VDC, 12 VDC, 5 VDC
Maximum payload power supply2.5 kW — depending on configuration
Internal payload volume1056 × 350 × 500 mm
External payload volume1500 × 1200 × 1000 mm

All mission endurance values depend on the specific mission parameters.

Request LM450 pricing

Tell us what you need to carry, how far out you need to operate and for how long. We’ll review the mission and provide a suitable LM450 configuration and quote.

Request pricing