L25 Marine Survey USV
Oceanalpha Multi-function Marine Survey USV
The L25 is a large-scale, multi-purpose surveying unmanned vessel specifically designed for hydrographic surveys in coastal areas and oceans. It features a modular catamaran design and a flexible payload system capable of accommodating various instruments. Equipped with a wide range of hydrographic and monitoring instruments, the L25 ensures exceptional survey performance and data quality in marine environments.
OceanAlpha USV
Hong Kong, CN
Description
L25 multi-purpose surveying unmanned vessel is LARGE size platform designed for hydrographic surveys in coastal areas and oceans. With modular catamaran design and flexible payload for instruments, L25 is expected to deliver high-quality survey performance with multi-beam sonar and different kinds of hydrographic and monitoring instruments in the ocean.
The dimension of the L25 unmanned surface vehicle is 7.5m(L) * 2.8m(W), weighs 2400kg, bears 200KG payload capability, is made of aluminium and carbon fibre materials suitable for high salinity seawater, and is anti-corrosive. Catamaran hull design greatly enhances sailing stability, enabling a top survey speed of 4~5kn and endurance of 65hrs. The USV has excellent cruise ability with autonomous navigation and intelligent obstacle avoidance functions to fit itself in large-scale inshore mapping; its 200KG payload capability allows it to carry SBES, MBES, 3D Lidar Scanner, Sidescan Sonar(SSS), Forward-looking Sonar, Interferometric Sonar, Weather Sation, ADCP and Water Quality Probe to be a multi-purposed unmanned ship for oceanographic survey in the deep ocean.
A portable base station is necessary to simplify the operation of this vehicle. It can receive various telemetric data of USV; the mapping equipment through a wireless communication system allows an operator to learn the status of mission completion and the attitude of the unmanned vessel. Its compact and lightweight hull allows only one operator to handle all the operations by using the designed base station. The base station plays an important role in mission planning, procedure programming, monitoring the real-time working status, receiving real-time data transmission with 1km data telemetry, 1km video transmission and 10km navigation control, as well as monitoring measurement data and mission completion of USV, receiving real-time multi-angel video, data storage and management.
In addition to the main base station, necessary accessories include a handled terminal controller used to operate the unmanned ship manually in a short distance covered within a 1km communication range which is portable and easy to change between auto and manual modes.
Large Capacity for Multi-function Instruments
- Wider deck, bigger payload, supporting multiple equipment work simultaneously for underwater inspection, hydrography survey and oceanography survey.
Longer Endurance, High Efficiency
- The internal combustion engine can extend the battery life to 72 hours.
- Long endurance enables round-clock inspection, feedbacking real-time data & video.
Advanced Design for Easy Configuration
- Small A-frame and winch support towing survey, cable length up to 200 meters;
- Foldable lifter protects instrument's wet ends and offers greater payload capacity
Stable Working Conditions for Survey
- Excellent stability, roll range smaller than 10 degrees in SS4.
- Catamaran design significantly reduces swaying and spray foam, providing stable and quiet working conditions for acoustic equipment
- Low-noise electric Plug-in thruster reduces signal-to-noise ratio by 20%
Autonomous Control with High Precision
- Radar, HD camera and AIS sensing enabling highly sensitive environmental perception
- Dual engine and dual propeller providing large torque, L25 can rotate in situ
- Able to navigate closely around constructions for zoom-in inspection
- Autonomous navigation algorithm, advanced obstacle avoidance algorithm and propulsion control algorithm applied to minimise the risk of collision
Auto Return
- During a mission, if the L25 loses communication or is about to run out of power, it can automatically sail back to the designated location to avoid getting lost on the sea.
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Specifications
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More information
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Applications
The L25 is a Large size autonomous survey platform which designed for bathymetry survey in coastal and ocean. With modular catamaran design and flexible payload for instruments, L25 was developed to provide high performance survey with single or multi beam sonar and different kinds of hydrographic and monitoring instruments in ocean.
Distinguishable features
Muti-beam sonar capability
Commercial Options
N/A
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General
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Length [m]
7.5
Width [m]
2.8
Height [m]
3
Min. weight of USV in air [kg]
2400
Max. Weight of USV in air [kg]
2400
Portable
N
Draft [m]
0.4
Number of thrusters
2
Thruster specifications
Propeller × 2 + Outboard Diesel Engine 50HP × 2
Chassis
Aluminum
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Communication and Control
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Type of Communication
Private Network 10km 丨 Option： Radio， Satcoms 丨 Remote Control 1km
Max. Baud rate [Mb/s]
500
Data sent to shore
Varies
Auto- control
Yes
Control parameters sent to the USV
Waypoint plan
Emergency recovery procedure
N/A
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Navigation and Payload
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Navigation sensors - standard
Radar,GNSS,Waypoint Autopilot,
Navigation sensors - optional
AIS,
Payload sensors - standard
N/A
Payload sensors - optional
Muti-beam Sonar, INS, Auto winch, Auto Payload Lifter,
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Operations
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Min. turning radius [m]
2
Operational Area
Harbor/Costal/Offshore/Wind Fram/Oil & Gas
Launch and Recovery System
Auto winch for profiling
Max. speed [kn]
10
Min. crew size
2
Min. required number of surface computers
1
Max. Remote Operating Range {m}
10000
Available size of storage room
1
Max. WMO seastate
4
Other requirements
N/A
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Energy and Propulsion
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Propulsion
Electric Propeller + Gasoline outboard engine
Energy Source
150L × 2 Fuel Tank
Propulsion Power
Diesel Generator
Endurance at nominal power [hr]
65hr @ 4kn
