What is the meaning of acoustic warfare counter-countermeasures?

See acoustic warfare Part 3.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
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APAMilitary Dictionary (DoD). (2011). acoustic warfare counter-countermeasures. Retrieved October 1, 2026, from http://smartdefine.org/acoustic_warfare_counter-countermeasures/definitions/1960068
ChicagoMilitary Dictionary (DoD). 2011. "acoustic warfare counter-countermeasures" http://smartdefine.org/acoustic_warfare_counter-countermeasures/definitions/1960068 (accessed October 1, 2026).
HarvardMilitary Dictionary (DoD) 2011, acoustic warfare counter-countermeasures, Smart Define, viewed 1 October, 2026, <http://smartdefine.org/acoustic_warfare_counter-countermeasures/definitions/1960068>.
MLAMilitary Dictionary (DoD). "acoustic warfare counter-countermeasures" 4 April 2011. Web. 1 October 2026. <http://smartdefine.org/acoustic_warfare_counter-countermeasures/definitions/1960068>