Cable wiper
Car obstacle monitoring system
Castable fish/depth finder
Cavitating body sonar system and process
Channel adaptive active sonar
Characteristic discriminating landmine hand prodder
Characteristic discriminating landmine hand proder
Charging circuit for sonar systems
Choke point bistatic sonar
Circuit arrangement for separating high-frequency pulses generat
Circuit arrangement for ultrasonic burglar security systems oper
Circuit arrangement of an ultrasonic-presence motion detector, p
Circuit for automatic seabed discrimination
Coded acoustic alarm transmitter/receiver system
Coherent integrator
Collision detection device
Color sonar for underwater object collision avoidance
Color sonar system for displaying echo signals from fish
Combination tape measure and range finder
Combined speed and depth sensor transducer