What is meant by "time fired" in relation to an IED?

"Time fired" refers to a method of initiating an improvised explosive device (IED) after a predetermined delay. This means that the device is designed to activate and explode after a specific period, allowing the person setting the IED to distance themselves from the device or create a tactical advantage.

The use of a time delay can be strategic in various scenarios, such as aiming to target crowds or high-traffic areas when casualties are more likely. It also allows for the possibility of the individual who set the device to leave the scene without being present at the moment of detonation, enhancing their safety while ensuring the device fulfills its intended purpose.

Understanding this timing mechanism is critical for first responders and explosive ordnance disposal teams to assess the threat level and respond appropriately. The other options describe different triggering mechanisms for IEDs, but they do not pertain specifically to the concept of "time fired."