FLS Series

Mine and Obstacle Avoidance Sonar


The FLS Series is the next generation mine and obstacle avoidance sonar. Derived from the sea proven technology of the 3D Multi-Beam Echo Sounder SeapiX, the FLS Series revolutionizes the market and increases performances.

The 3D Multi-Beam Echo Sounder has been developed upon request of the French Armament Secretary for multipurpose applications such as mine and obstacle avoidance, real-time mapping and navigation, and Rapid Environment Assessment (REA).

The FLS Series is available in two versions :

  • FSL 150, very compact packaging, for portable and lightweight integration, for patrol ships or USVs integration.

  • FLS 60, for large ships or submarines integration. The FLS Series is fully mission configurable.



  • Real-time 3D detection and geo-referencing with an embedded IMU for optimized stabilization
  • 3D volume imaging and visualization into ECDIS environment
  • Easy integration with hull mounting capacity and wet mateable connection.


  • Bottom, water column and surface object detection
  • Forward Looking Bathymetry and backscattering of vessel for real time REA
  • Vertical and horizontal scanning Database & HTML communication protocol, allowing easy integration in third-party software.


Main performances


  FLS 150 FLS 60
Type MOAS for OPVS and unmanned systems MOAS for surface ship and submarines
Main detection performances    
Anchored mines (-15 DB) >330 m >650 m
Drifting mines (-15 DB) >330 m >350 m
Bottom mines (-15 DB) >300 m >350 m
Low TS mines (-25 DB) >250 m >520 m