Surveillance Technologies For Three Dimensional Navy
Sonar uses sound waves to detect, locate, and identify objects in water. The
  term Sonar is an acronym for sound navigation and ranging. Ships and
  submarines primarily use Sonars for underwater navigation and surveillance.
  The design of Sonar requires expertise in sensor technology, signal
  conditioning and processing, electronic packaging, materials technology, ocean
  acoustics, and

 
																			 
																																		 
																																		 
																																		