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Country of Origin: France


The DSTA 3 was an active sonobuoy that detected and localized submarines through the use of a miniaturized active sonar unit. The DSTA also exploited the Doppler effect to determine the target's approximate speed.

The system contained a UHF receiver with several channels that allowed the sonar transmitter to be turned on or off from the monitoring aircraft and a VHF transmitter that relayed data to the aircraft.


The DSTA 3 is no longer in active French naval service, the last...

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