Sonar Sound Navigation Ranging

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Sonar sound navigation and ranging. Sonar signal systems are generally used underwater for range finding and detection. Active sonar emits an acoustic signal, or Royalty Free Stock ImagesSonar sound navigation and ranging. Sonar signal systems are generally used underwater for range finding and detection. Active sonar emits an acoustic signal, orSmall-sized underwater scanning sonar. ST.-PETERSBURG - JUL 05: The autonomous self-propelled small-sized underwater vehicle with scanning sonar on International Stock ImagesSmall-sized underwater scanning sonar. ST.-PETERSBURG - JUL 05: The autonomous self-propelled small-sized underwater vehicle with scanning sonar on InternationalEmit/Receive hydroacoustic device. ST.-PETERSBURG - JUL 05: Emit/Receive hydroacoustic device on International maritime defence show (IMDS-2013) on Jul 05, 2013 Stock PhotosEmit/Receive hydroacoustic device. ST.-PETERSBURG - JUL 05: Emit/Receive hydroacoustic device on International maritime defence show (IMDS-2013) on Jul 05, 2013