There are two types of sonar: Passive and Active. Active sonar sends out a burst of sound. Once that sound hits an underwater object, it bounces back at the sub and the computers calculate the ...

In order to find targets, either hostile or friendly, a submarine uses both active and passive SONAR, or Sound Navigation and Ranging. Active sonar works by sending out an energy pulse that passes ...

Chinese scientists' new acoustic technology could help detect submarines with near-perfect accuracy in the Arctic’s Beaufort ...

This has been operational since 2014. Based on the development of LFAS, we are currently working on the next challenge, torpedo defense using passive and active sonar.

Writing in the active voice makes the meaning clear while keeping sentences from becoming complicated and wordy. Sentences using passive voice are not necessarily wrong, just less effective than ...