Extract
Developments in Sonar Arrays.
Although the anti-submarine warfare "community' hankers after non-acoustic methods of detecting submarines, for the foreseeable future acoustics will continue to be the main path to success. Within that broad spectrum, however, there are many variations and special applications.
Many navies still use medium-frequency (MF) active sonars, but all can act in a passive mode, if needed. Major ASW operators have shifted to low-frequency (LF) passive systems to exploit the huge distances travelled by sound, as against the high power-output needed to extend the range of active systems. There is also considerable difference between surface ship and submarine sonars (although they share a common technological base) because of the way in which th...See the full content of this document
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