Which three dimensions are provided in data for a rectangular sheaf?

The correct response highlights the dimensions pertinent to a rectangular sheaf in the context of call for fire scenarios. A rectangular sheaf is typically defined with respect to its length and width, which specify the area of effect in which the ordinance will be effective. The term "attitude" can be interpreted as a reference to the orientation of the sheaf on the battlefield, which ties into how the effects of fire are applied within the defined horizontal dimensions.

Understanding this framework is essential for the effective planning and execution of artillery fire missions, as these dimensions directly influence how projectiles will be delivered and the impact they have on the designated target area. By accurately identifying the length, width, and attitude, personnel can enhance targeting accuracy and increase the effectiveness of the fire support provided.

The other choices present dimensions that do not directly correlate to the characteristics of a rectangular sheaf in the context of artillery targeting. For instance, range, bearing, and altitude relate more closely to the positioning and trajectory of projectiles rather than the spread area of their effects.