What is described as the thick metal base of ordnance that typically travels far upon detonation?

The thick metal base of ordnance that typically travels far upon detonation is accurately described as the base plate. This component is designed to withstand the force of an explosive charge during detonation and plays a critical role in maintaining the integrity of the ordnance while also facilitating its dispersal upon explosion. The base plate's robust design allows it to be propelled away from the blast area, often resulting in its significant travel distance.

While there are other components mentioned in the choices, they do not specifically refer to the thick metal base that is characteristic of ordnance design. The base ejector is a mechanism that might be involved in triggering the ejection of content or components of the explosive, but it does not define the physical structure that serves as the ordnance's foundation. Similarly, the reinforced base typically refers to a general strengthening of a base for handling stress, not specifically highlighting its travel upon detonation. An impact plate would relate more to the point of contact or detonation rather than serving as the foundational part that is designed to travel a considerable distance. Therefore, the correct understanding of the base plate's role and design directly aligns with its function in explosive ordnance.