One or more actions necessary to prevent or interrupt complete function of the system (traditionally synonymous with dearm, disarm, and disable). Among the necessary actions are: (1) install (safety devices such as pins or locks); (2) disconnect (hoses, linkages, batteries); (3) bleed (accumulators, reservoirs); (4) remove (explosive devices such as initiators, fuzes, detonators); and (5) intervene (as in welding, lockwiring).
MAKE SAFE
Meaning of MAKE SAFE in English
DOD English dictionary of military terms. Английский словарь военных терминов DOD. 2012