MIL-STD-1316E
3.10 Enabling. The act of removing or activating one or more safety features designed to prevent arming, thus permitting arming to occur subsequently.
3.11 Environment. A specific physical condition to which the fuze may be exposed.
3.12 Environmental stimulus. A specific stimulus obtained from an environment.
3.13 Explosive ordnance disposal. The detection, identification, field evaluation, rendering safe, recovery, and final disposal of hazardous unexploded explosive ordnance.
3.14 Explosive train. The detonation or deflagration train (i.e., transfer mechanism), beginning with the first explosive element (e.g., primer, detonator) and terminating in the main charge (e.g., munition functional mechanism, high explosive, pyrotechnic compound).
3.15 Fail-safe design. A characteristic of a fuze system or part thereof designed to prevent fuze function when components fail.
3.16 Firmware. The combination of a hardware device and computer instructions or computer data that resides as read only software on the hardware device. The software cannot be readily modified under program control.
3.17 Function. A fuze "functions" when it produces an output capable of initiating a train of fire or detonation in an associated munition.
3.18 Fuze (Fuzing System). A physical system designed to sense a target or respond to
one or more prescribed conditions, such as elapsed time, pressure, or command, and initiate a train of fire or detonation in a munition. Safety and arming are primary roles performed by a fuze to preclude ignition of the munition before the desired position or time.
3.19 Fuze installation. The act of installing or inserting the assembled fuze into the munition in which it is to function.
3.20 Fuze safety system. The aggregate of devices (e.g., environment sensors, launch event sensors, command functioned devices, removable critical items, or logic networks, plus the initiation or explosive train interrupter, if applicable) included in the fuze to prevent arming and functioning of the fuze until a valid launch environment has been sensed and the arming delay has been achieved.
3.21 Independent safety feature. A safety feature is independent if its integrity is not affected by the function or malfunction of other safety features.
3.22 Initiator. A device capable of directly causing functioning of the fuze explosive train.
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