11m Foil Assisted Trimaran Sea Drone USV Unmanned Boat
with Automatic LARS Launch and Recovery System
Architecture &Design Andrei Rochian

The first (ever) Unmanned Watercraft Drone Boats designed for Romania has been presented at National Military Circle Black Sea Defense & Aerospace 2024 Bucharest May 22, 2024 and has been applauded by the Admiral of the Romanian Naval Forces
A sensor-based launch and recovery system (LARS) for unmanned surface vehicles (USVs) is a mechanism designed to deploy and retrieve USVs from a mother ship, especially in challenging sea conditions. Here's an overview of what it is, how it works, and its applications:
What is a Sensor-Based Launch and Recovery System?
A sensor-based LARS utilizes various sensors and automated controls to ensure the safe and efficient launch and recovery of USVs. The system relies on real-time data from sensors to monitor and adapt to the surrounding environment, making it capable of operating even in rough sea conditions.
How It Works
1. *Sensors Integration:*
*Environmental Sensors:* These include wave height sensors, wind speed sensors, and sea state sensors that provide real-time data on the marine environment.
*Positioning Sensors:* GPS, inertial measurement units (IMUs), and other positioning systems ensure accurate location tracking of both the mother ship and the USV.
*Proximity Sensors:* These sensors (such as LiDAR, sonar, and cameras) help in detecting and avoiding obstacles during the launch and recovery process.
2. *Automated Control System:*
The system integrates sensor data to control the launch and recovery machinery.
It uses algorithms to calculate the optimal timing and positioning for deployment and retrieval, minimizing the impact of waves and ship movement.
The control system can adjust the speed, angle, and trajectory of the USV during launch and recovery to ensure a smooth operation.
3. *Launch Process:*
The mother ship positions itself in a suitable location, guided by environmental and positioning sensors.
The automated system aligns the launch apparatus with the USV.
At the optimal moment, the USV is released, with sensors and controls ensuring it enters the water safely and smoothly, regardless of wave conditions.
4. *Recovery Process:*
The USV approaches the mother ship, guided by positioning and proximity sensors.
The recovery apparatus extends, often using a robotic arm or a cradle system.
Sensors guide the USV into the recovery mechanism, compensating for any ship movements and ensuring a secure capture.
The USV is then hoisted back onto the mother ship, with the system adjusting for any pitch and roll of the vessel.


A launch and recovery system for unmanned surface vehicles is a technologically advanced solution that enhances the efficiency, safety, and reliability of deploying and retrieving USVs from a mother ship, even in challenging marine environments.
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