Go to HOME PageGo to MARINE SYSTEMS PageGo to DEFENCE PageGo to HOMELAND SECURITY PAGEGo to LIFE SCIENCE Page

 Hydrophones     Projectors     Echo Sounders      Sidescan Sonar     Sonar Test & Evaluation     Telemetry & Acoustic Releases      Calibration  


Chelsea Technologies Group manufactures a wide range of state of the art equipment and systems for calibration, test & general performance evaluation of airborne, surface ship and submarine sonars. The core technology has developed over a number of years & now includes the ERAS, PERS & VASS range of products. 


Click to learn more about ERAS a compact and versatile system for the performance evaluation of a wide range of active and passive sonar. Click to learn more about VASS is a highly versatile and flexible sonar test system designed  to evaluate the performance of a wide range of active and passive sonars. Click to learn more about PERS - a compact and versatile system for the performance evaluation of a wide range of active and passive sonar.

Echo Repeater Acoustics Source

ERAS is a compact and versatile system for the performance evaluation of a wide range of active and passive sonar.  It has been designed to be hand-deployed from small vessels with few facilities - the transducer assembly is a small lightweight unit containing both projector and hydrophone.  At the surface, the system includes a rugged, portable, power amplifier unit and a controlling computer.

Versatile Acoustic Source System

VASS is a highly versatile and flexible sonar test system designed  to evaluate the performance of a wide range of active and passive sonars.  It can produce complex calibrated transmissions in addition to echo repeating, transponding and acting as a calibrated receiver. VASS can be deployed from relatively small vessels with few facilities required other than power and a crane or A frame.

Portable Echo Repeater System  

PERS is a compact and versatile system for the performance evaluation of a wide range of active and passive sonar. It includes many of the powerful features of VASS but without the complexity of a towed format obviating the need for larger vessels.  PERS has been designed to be hand-deployed from small vessels with few facilities - the transducer assembly is a small lightweight unit containing both projector and hydrophone.   

Download ERAS brochure (pdf) 

Download VASS Datasheet (pdf)

Download PERS Datasheet (pdf)


Home Page   
Life Science 
I  Life Science Case Studies I  Life Science Key Disciplines I  Life Science Design & Manufacture I  Defence I  Homeland Security I  Marine Sensors & Systems I  Acoustic & Sonar Systems I  Fluorimeters I  Towed Platforms I  Oceanographic Sensors I  FerryBox I  Equipment Rental I  Pipeline Leak Detection System I  Calibration Facility I  Location Map I  Group Background I  News I  Jobs I  Representatives Details I  Technical Papers I  Enquiry Form