What is the meaning of minimum safe altitude?

(DoD, NATO) The altitude below which it is hazardous to fly owing to presence of high ground or other obstacles.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
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APAMilitary Dictionary (DoD). (2011). minimum safe altitude. Retrieved September 22, 2026, from http://smartdefine.org/minimum_safe_altitude/definitions/1962830
ChicagoMilitary Dictionary (DoD). 2011. "minimum safe altitude" http://smartdefine.org/minimum_safe_altitude/definitions/1962830 (accessed September 22, 2026).
HarvardMilitary Dictionary (DoD) 2011, minimum safe altitude, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/minimum_safe_altitude/definitions/1962830>.
MLAMilitary Dictionary (DoD). "minimum safe altitude" 4 April 2011. Web. 22 September 2026. <http://smartdefine.org/minimum_safe_altitude/definitions/1962830>