Acoustic Sonar Systems

Submarine Test & Evaluation

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 & VASS range of products. Existing users of these systems include UK QinetiQ, UK Director of Submarines, NATO SACLANT Undersea Research Centre, La Spezia, Italy, the Begian Navy, and EDO Corporation, USA.

	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.
Custom Design
	Custom Design: Chelsea Technologies Group has the acoustics and electrical expertise to design and manufacture bespoke acoustic systems or elements of systems. New systems recently developed to clients’ individual specifications include the vertical hydrophone array for acoustic communication studies and the design of bulkhead mounted transducers for use in a harbour defence system.