Lubell Labs - Manufacture underwater speakers for the scientist, synchronized swimmer, lap swimmer, and scuba diver. International Transducer Corporation - Manufacturer of acoustic transducers for ship and submarine sonar, oceanographic survey, seismic exploration, marine life research, medical devices and industrial proximity sensing. Lowrance - Manufacturer of recreational marine and GPS electronics for the consumer sport fishing, boating, aviation, automotive and outdoors recreation markets. Sippican - Manufactures expendable oceanographic and meteorologic instrumentation and associated data acquisition systems; communication and navigation antenna systems for submarines and aircraft and autonomous underwater vehicles for anti-submarine warfare . Sonalysts, Inc. - Provides analysis of submarine sonar systems, and a wide variety of airborne, surface, subsurface and land-based navy systems. Neptune Sonar Limited, - Manufacture, calibrate and supply underwater sonar acoustic transducers for commercial and military applications. Ocean Engineering Enterprises - Manufactures underwater loudspeakers, hydrophones, diver recall systems, diver signaling devices and synchronized swimming sound systems . Sunwest Technologies, Inc. - Manufacture CTFM search and obstacle avoidance scanning sonars, Doppler current profilers and acoustic test instruments. LinkQuest Inc. - Designs and manufactures 9600 baud, underwater acoustic modems and precision marine geodetic systems. Marschall Acoustics Group - Design and manufacture acoustic and nonacoustic instrumentation for underwater and subsurface geophysical imaging applications for the industrial, government, and defence sectors. Subacoustech Ltd - Consultancy in underwater acoustics. Services include the environmental effects of underwater sound, noise and diving and acoustic altimetry . United Kingdom . L-3 Communications ELAC Nautik GmbH - Manufacture echosounders and sonars, underwater communication systems, multibeam systems, transducers and hydrophones. Klaxon Signals Ltd. - Manufacturer the Vitavox range of naval and underwater loudspeakers and microphones. Subsea Services Incorporated - Provider of underwater inspection, maintenance and repair services to the marine industry. AquaCoustic Remote Technologies Inc - Providing remote-sensing services for your underwater needs, using SONAR systems and proprietary software programs. Advansys Solutions Ltd - Design and develop software for sonar used in navel combat systems. Sensor Technology Limited - Producer of piezoelectric ceramics and materials for transducer OEMs. Manufacturer of underwater sensor and transducer devices.