Which term specifically refers to sensing that indicates a target is closer than estimated?

The term that specifically refers to sensing that indicates a target is closer than estimated is “short.” In military operations and target engagement, if a unit or individual senses that a target is closer than originally believed, it often means that they may need to adjust their targeting parameters, such as range or elevation, to effectively engage the target. The use of the term "short" typically conveys that the actual distance to the target is less than what was calculated or expected, leading to potential adjustments in firing solutions or tactics. Recognizing when a target is short allows for rapid decision-making and effective engagement in dynamic combat situations.

The other terms do not directly address this specific phenomenon related to the proximity of a target. "Hasty" typically refers to quick decision-making or actions taken under time pressure, "neutral" usually denotes a state of non-engagement or non-hostility, and "immediate" implies urgency but does not speak to the aspect of distance or proximity in target acquisition. Thus, "short" is the most appropriate term that encapsulates the concept of sensing a target being closer than previously estimated.