OVERVIEW: The AN/SSQ-125 is an "A-size" command activated, omni-directional, active buoy used to generate source waveforms in a multi-static sonobuoy field. 
 
DETAILS:  A multistatic sonar network (MSN) is characterized by one receiver receiving transmissions from more than one transmitter, each placed at different locations.  This provides improved triangulation and increased covertness of the receiving platform, multi-platform operations and  multi-angle observations and can improve target tracking accuracy. 

The AN/SSQ-125 sonobuoy is a source generator in a multistatic field and can generate a variety of waveforms.  It produces electronic (coherent) pulses of various types and lengths that enable Doppler processing to distinguish moving targets from stationary features of the environment (such as shipwrecks). It is designed to work with the AN/SSQ-53F/G, AN/SSQ-77C, and AN/SSQ-101B (ADAR) sonobuoys. On command, the AN/SSQ-125 can generate a variety of waveforms (CW, Shaded Hanning CW, Hyperbolic-FM (HFM), HFM train, Sinusoidal FM (SFM), Linear FM up/ down, Costas SONAR) .

The AN/SSQ-125 can be set to operate in one of 96 pre-set UHF channels.  

Specifications:
	
	Operating Life:		8 hours
	Ping-seconds		140
	Sonic Frequency:	1-5 kHz (950 Hz baseline)
	Operating depth(s)	65, 175, 300, 500 feet (19.8, 53.3, 91.4, 152 meters)

 

NOTES:   

SOURCES: Seapower. (04 March 2021).  https://seapowermagazine.org/navy-orders-20000-ssq-125-sonobuoys/ ; Keller, J. (n.d.). Navy makes big purchase of multistatic sonobuoys for anti-submarine warfare (ASW) against advanced threats. Military Aerospace. https://www.militaryaerospace.com/sensors/article/14198901/antisubmarine-warfare-asw-sonobuoys-multistatic ; Multistatic acoustic submarine detection. (n.d.). https://www.onr.navy.mil/en/About-ONR/History/tales-of-discovery/multistatic-acoustic-submarine-detection ; Products. (n.d.). Sonobuoy TechSystems. https://sonobuoytechsystems.com/products/ ; Sonobuoy Tech Systems. (n.d.). AN/SSQ-125 Sonobuoy. Sonobuoy TechSystems. https://sonobuoytechsystems.com/wp-content/uploads/2019/08/Q125.pdf
 