What is the meaning of free mine?

(DoD, NATO) In naval mine warfare, a moored mine whose mooring has parted or been cut.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
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APAMilitary Dictionary (DoD). (2011). free mine. Retrieved September 25, 2026, from http://smartdefine.org/free_mine/definitions/1961849
ChicagoMilitary Dictionary (DoD). 2011. "free mine" http://smartdefine.org/free_mine/definitions/1961849 (accessed September 25, 2026).
HarvardMilitary Dictionary (DoD) 2011, free mine, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/free_mine/definitions/1961849>.
MLAMilitary Dictionary (DoD). "free mine" 4 April 2011. Web. 25 September 2026. <http://smartdefine.org/free_mine/definitions/1961849>