SONATECH

TRANSPONDERS, PINGERS, BATTERY PACKS, ACOUSTIC TRANSMITTERS, ACOUSTIC RECEIVERS, ACOUSTIC PENETROMETER, TRANSCEIVERS, SIGNAL DISPLAY UNITS, SIGNAL PROCESSORS; ACOUSTIC TELEMETRY SYSTEM COMPRISING UNDERWATER TRANSCEIVERS, DATA MODULATOR/DEMODULATOR AND TRANSDUCERS; ACOUSTIC COMMAND AND CONTROL SYSTEM COMPRISING ABOVE WATER TRANSCEIVERS, ENCODER, TRANSDUCER, TIMER AND ELAPSED TIME DISPLAY; SCANNING SONAR SYSTEM COMPRISING ABOVE-WATER CONTROL AND DISPLAY UNIT, UNDERWATER TRANSDUCER AND TRANSCEIVER, PRE-AMPLIFIER, HYDROPHONES; AND CIRCUIT BOARDS FOR THE ABOVEIDENTIFIED ELECTRIC AND ELECTRONIC COMPONENTS