The L25 is a versatile, large-scale USV designed to support multi-purpose oceanographic and hydrographic surveys. Its modular catamaran design and substantial payload capacity allow for the integration of various instruments, ensuring high-quality data collection over extended missions.
Key Features:
Exceptional Payload Capacity:
With a payload capacity of up to 200 kg, the L25 accommodates multiple instruments simultaneously, including multibeam echo sounders, side-scan sonars, sub-bottom profilers, and water quality sensors, facilitating comprehensive survey operations.
Extended Endurance:
Powered by dual 50HP outboard diesel engines, the L25 offers an endurance of up to 65 hours at a cruising speed of 4 knots, enabling prolonged missions without the need for frequent refuelling.
Advanced Instrument Deployment:
Equipped with a small A-frame and winch system supporting cable lengths up to 200 meters, along with a foldable lifter, the L25 ensures safe and efficient deployment of towed instruments and protection of sensitive equipment.
Stable Survey Platform:
The catamaran hull design provides excellent stability, with a roll range of less than 10 degrees in sea state 4 conditions. The low-noise electric plug-in thruster reduces the signal-to-noise ratio by 20%, ensuring optimal performance of acoustic equipment.
Autonomous Navigation and Obstacle Avoidance:
Featuring radar, AIS, and four HD cameras, the L25 offers high-precision environmental perception. Its autonomous navigation algorithms and propulsion control systems enable precise manoeuvring and obstacle avoidance, including the capability to rotate in place.
Automatic Return Function:
In the event of communication loss or low power, the L25 is programmed to automatically return to a designated location, preventing potential loss at sea.
The L25 Unmanned Surface Vehicle (USV) is a high-capacity, multi-function marine survey platform designed for demanding oceanographic and hydrographic missions. Capable of carrying up to 200 kg of instruments, it supports simultaneous deployment of hydrographic, geophysical, and biological monitoring equipment for deep-sea surveys.
With its wider deck and larger payload capacity, the L25 enables multiple systems to operate at once, making it ideal for underwater inspections, hydrography surveys, and physical oceanography research. A small A-frame and winchsupport towed surveys with cables up to 200 m in length, while a foldable lifter safeguards instrument wet ends and allows for even greater payload flexibility.
The L25 delivers exceptional endurance, with a standard range of 65 hours at 4 knots, extendable to 130 hours far exceeding the operational time of similar-sized manned vessels. Its catamaran hull design offers excellent stability, maintaining a roll range of less than 10 degrees in SS4 sea states. Low-noise plug-in electric thrusters reduce signal-to-noise ratio by 20%, ensuring optimal conditions for acoustic surveys.
Advanced autonomy comes as standard, with radar, HD cameras, and AIS providing real-time environmental awareness. Dual engines and dual propellers deliver powerful torque and allow the L25 to rotate on the spot, navigate precisely around structures, and carry out close-up inspections. Its autonomous navigation, obstacle avoidance, and propulsion control algorithms minimise the risk of collisions, while the auto-return function ensures the vessel sails back to its designated location in the event of power depletion or loss of communication.
The L25 USV combines high payload capacity, long endurance, and advanced autonomy to succeed in deep-sea expeditions to precision coastal surveys.
| Feature | Specification |
| Hull Material | Aluminium Alloy |
| Dimensions (L × W × H) | 7.5 m × 2.8 m × 3 m |
| Weight | 2,400 kg |
| Payload Capacity | 200 kg |
| Draft | 40 cm |
| Propulsion | 2 × Propellers + 2 × 50HP Outboard Diesel Engines |
| Communication Range | 10 km |
| Maximum Speed | 10 knots |
| Endurance | 65 hours at 4 knots |
| Operation Sea State | Up to SS 3 |
| Collision Avoidance | Side Lights, AIS, Navigation Radar, 4 × HD Cameras |
| Video Monitoring | Yes |
| Multi-Mission Capability | Yes |
| Automatic Payload Lifter | Yes |
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