MIL-HDBK-757, MILITARY HANDBOOK: FUZES (15 APR 1994)., The word fuze is used to describe a wide variety of devices used with munitions to provide basically the functions of (1) safety, i.e., keeping the munitions safe for storing, handling (including accidental mishandling), transportation, and launching or emplacing,(2) arming, i.e.sensing the environment(s) associated with actual use including safe separation and, thereupon, aligning explosive trains, closing switches and/or establishing other links or logic to prepare the munition for functioning, and (3) firing, i.e., sensing the point in space or time at which initiation is to occur and effecting such initiation.