Which of the following best defines the term "near-surface burst" (NSB)?

The term "near-surface burst" (NSB) is characterized by a detonation that occurs very close to the ground, specifically within 1 meter of the surface. This definition is crucial because the effects of a near-surface burst differ significantly from those of detonation at greater heights.

When a round detonates within this range, the ground can reflect and amplify the blast and shockwave effects, often resulting in a more concentrated and destructive impact on targets. This is particularly relevant in military operations, where understanding the nuances of different detonation types can influence strategy and effectiveness in achieving desired outcomes during engagements.

Other options describe bursts that are either at ground level or at distances greater than 1 meter from the ground, and these do not accurately capture the specific characteristics associated with the near-surface burst designation. Such distinctions are vital for military tactics and the effective utilization of munitions.