Sonobuoy TechSystems provides customers with the most effective airborne ASW sensor capability available in the world today.

The ERAPSCO/ Sonobuoy TechSystem (STS) Joint Venture will dissolve on September 30, 2023, and Sparton and Ultra Maritime will individually produce sonobuoys under their respective company’s names. Beginning on October 1, 2023, please contact Sparton and or Ultra Maritime at for all inquiries.