SOME OF THE MID FREQENCY (3-15 kHz),
ASW SONARS DEVELOPED AND MANUFACTURED
BY MASSA FOR SURFACE SHIPS

• TR-208A/SQS-23 - This Massa proprietary design revolutionized ceramic scanning sonar transducers.
  
  
• TR-237 & TR-238 - Massa is sole source of this ceramic replacement design for many different sonar systems.
  
  
• TR-330/SQS-56 - Massa is sole source of this redesigned transducer and cable system.
  
  
• TR-229/SQS-35 VDS - Massa is sole source for this redesigned dual stave assembly.
  
  
• MODEL M-1002 - Massa proprietary Light-Weight Low-Frequency Portable Sonar System.

Air/Ultrasonics • Underwater • Fundamentals of Electroacoustics
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