Courtesy of Sonobuoy TechSystems

Various Passive Sonobuoys


Sonobuoy TechSystems offers several different passive sonobuoys with varying ranges and capabilities.
These buoys use hydrophones in order to convert underwater sound into electrical signals - ideal for monitoring sounds in MPAs - which are amplified and frequency modulated for very high frequency (VHF) transmission, which allows the user to interpret the data.

Stealth mode: Most of the sonobuoys available automatically scuttle, or sink, within 8 hours of deployment. These passive sonobuoys can precisely determine a submarine's location, course and speed. This passivity feature allows the buoy to go undetected by the submarines being tracked.

Powered by salt: Each buoy comes equipped with a battery that becomes energized once in contact with the salt water and once this feature is activated, sensors are then released to specified depths.

Keep it safe: These Passive sonobuoys are usually shipped in a Sonobuoy Launch Containers, which is a multipurpose container used for shipping, storage and aircraft launch container or in a gray overpack for pneumatic or free-fall launch.


Depth: 150-300 meters depending on the model
Endurance: Up to 8 hours depending on the model

Several models were manufactured directly for the U.S. Navy.
  • Company: Sonobuoy TechSystems

  • Type: Buoys

  • Direct Cost:

  • Indirect Cost: Option for precision-calibrated hydrophones

  • Link: Product Website

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