Which spotting indicates the burst located at the same level as the observer?

The term that indicates a burst located at the same level as the observer is "Graze." In military terminology, when a round is said to graze, it means that its detonation occurs at ground level or just above the surface, which aligns with the observer's field of view and position. This type of spotting is critical as it provides information about the effectiveness of fire on a target that is situated at the same elevation as the observer, which can have direct implications for how fire support is coordinated and adjusted.

Understanding the elevation and location of the burst in relation to the observer is essential for accurate targeting. A graze spotting can be particularly relevant when considering the impact on enemy forces or structures, as it can minimize collateral damage while maximizing the effectiveness of the strike.

The other terms such as aimless, air, and mixed refer to different scenarios regarding the location and impact of explosive rounds and do not indicate a detonation level that matches the observer's position. Aimless generally implies a lack of direction, air indicates a burst high above ground, and mixed refers to varying elevations of bursts. Thus, "Graze" is the correct understanding of a burst occurring at the same level as the observer.