Exail Ramses: Acoustic LBL Transceiver

The Core of Next-Generation Sparse-LBL and Autonomous Subsea Navigation

Product Overview The Exail Ramses is an advanced acoustic synthetic baseline (ASBL) transceiver designed to simplify subsea positioning. While traditional LBL systems require complex arrays and surface-side processing, Ramses features a fully embedded architecture that calculates position data directly on the subsea vehicle.

Ramses is the "active" partner to the Canopus transponder. When tightly coupled with Exail’s Inertial Navigation Systems (INS) like Phins or Rovins, it enables Sparse-LBL—a revolutionary method that achieves centimetric accuracy using significantly fewer seabed transponders. This integration allows for robust, drift-free navigation even with just a single transponder in range.

Why Choose the Exail Ramses?

• The Sparse-LBL Advantage: By fusing acoustic ranges with INS data via an internal Kalman filter, Ramses reduces the number of required seabed beacons by up to 75%, drastically lowering vessel time and deployment costs.
• Tightly Coupled Navigation: Direct subsea processing eliminates the latency and time-stamping errors common in surface-processed systems, providing the most stable aiding data possible for ROVs and AUVs.
• SLAM Calibration: Supports Simultaneous Localization and Mapping (SLAM), allowing the vehicle to calibrate the seabed transponder array while simultaneously navigating through it—eliminating the need for separate "box-in" missions.
• Massive Battery Savings: Because Ramses is intelligent, it can use an individual interrogation schema. This can save up to 90% of transponder battery life compared to legacy LBL systems that require common interrogations.
• No Topsides Required: Ramses operates autonomously. It does not require an umbilical for positioning or a dedicated topside computer, making it ideal for untethered AUV missions and simplified ROV mobilization.