What defines a firepower kill?

A firepower kill refers to a situation where a unit has been rendered ineffective in its ability to engage in combat while still retaining some degree of mobility. This means that the unit is unable to shoot but can still move. This definition highlights the focus on the unit's combat capabilities, indicating that while it can relocate, its firepower—the ability to engage the enemy—is compromised.

In this context, it's essential to understand what differentiates the various states of incapacitation a military unit may experience. A unit that cannot move but can communicate is still operational to some extent, and one that cannot perform any combat function is categorized more severely, potentially leading to a total loss of operational capability. A unit that can still move and shoot would not qualify as a firepower kill, as it retains its ability to engage effectively in combat. Therefore, the correct answer emphasizes the specific aspect of combat function—specifically the ability to shoot—being neutralized while mobility remains intact.