Seafloor Collision Avoidance Assist (CAA)

The Seafloor Systems Collision Avoidance Assist (CAA) is a safety and assistance system for unmanned surface vehicles (USVs) that enhances collision detection and avoidance during hydrographic surveys. CAA is designed as an extension of the AutoNav autopilot and improves operational safety, particularly in complex or busy waters. 

The system combines a powerful on-board computer with 360° LiDAR sensors to detect and track stationary and moving obstacles in real time. Based on a three-dimensional point cloud analysis, objects are typically detected within a radius of approximately 25 m; with higher-resolution LiDAR hardware, this range can be extended to up to 50 m. The detected obstacles are passed to AutoNav, which then performs gentle evasive manoeuvres along the planned route.

CAA has a modular design, is integrated into AutoNav and requires no additional operating or control software. It is specifically intended as an assistance system and does not replace constant monitoring by the operator (human-in-the-loop principle). Typical platforms of use are USVs such as the EchoBoat-160, EchoBoat-240 and HydroCat 550, where CAA helps to reduce navigation errors, protect measuring equipment and increase the efficiency of autonomous surveying missions.