L-3 Communications Klein Associates, Inc. consistently provides the most competitive products which meet customer needs and exceed expectations. L-3 Klein has recently completed the design and development of a Model 3900 Side Scan Sonar. The system is extremely high resolution digital side scan sonar for use in Search and Recovery missions which require a portable side scan system. The model has a dual frequency capability with 445 kHz offering excellent range and resolution and 900 kHz which offers higher resolution of identified items of interest. The system is competitively priced and configured to operate by one man from a small boat in shallow water. The standard system configuration comes complete with a splash proof Transceiver Processing Unit (TPU), custom configured laptop and 50m of lightweight tow cable. The Model 3900 Towfish electronics are housed in a stainless steel body with a phosphorescent finish for easy underwater identification. The L-3 Klein 3900 Search and Recovery System was specifically designed for use by Police Departments, Fire Departments and Rescue Groups. The intent of this design is to offer Police, Fire and Rescue groups a high caliber Side Scan Sonar at an affordable price.