LBL Positioning Systems

Overview

Long Baseline (LBL) remains the preferred solution for the highly accurate subsea positioning of AUVs or ROVs. However, this solution remains costly as it requires the use of at least four transponders to produce a single position.

With the use of INS in subsea vehicles becoming common, sparse-LBL navigation has become possible, achieving similar or better performance using less transponders, simply by fixing potential INS drift using the measured ranges to the seabed transponders while at the same time filtering acoustic ranges using INS data.

Coupling Ramses LBL transceiver, Canopus LBL transponder and an iXblue subsea INS provides an integrated subsea positioning system allowing for precise localization while maintaining unrivaled flexibility.

Using a stand-alone Canopus array makes its communication capabilities the ideal solution for geodetic application.

Product range

Ramses

Ramses

LBL AND SPARSE-LBL INTELLIGENT TRANSCEIVER

Canopus

Canopus

LBL AND SPARSE-LBL INTELLIGENT TRANSPONDER

Specifications

Main performances

  Ramses Canopus
  MF LF  
Accuracy (mm) < 10 < 10 <10
Autonomy (pings at max sound level) -- -- >1,000,000
Autonomy (listening) -- -- Up to 4 years
Transducer beam shape Omnidirectional Omnidirectional --
Data telemetry Yes n/a Yes
Data logging (Gb) Up to 32 n/a Up to 32
Water depth (m) Up to 6,000 Up to 6,000 Up to 6,000
Construction Aluminium Titanium Aluminium
Compatibility Gaps, Canopus, iXblue INS, third-party acoustic systems Gaps, Canopus, iXblue INS, third-party acoustic systems Gaps, Ramses, iXblue INS, third-party systems
Options -- -- Inclinometer, pressure, temperature, release, SV sensors, Parioscientific(TM) depth sensor