Which three methods can soldiers use on a map to determine range to a target?

The correct choice highlights three effective methods for soldiers to determine the range to a target using a map. Understanding how to utilize one's own location, marginal data, and terrain association is essential for accurately assessing distance.

Using one's own location allows soldiers to establish a baseline reference point on the map from which to measure the distance to a target. Marginal data often includes information like contour lines, distance scales, and symbols that can indicate the nature of the terrain and the location of various features. This data can help soldiers calculate range based on the characteristics of the landscape. Terrain association further aids in this process by allowing soldiers to visualize and relate the map features to the actual environment they observe, providing a frame of reference for estimating distance.

In contrast, the other options involve elements that either do not provide a direct method for measuring range or would not be as reliable in all situations. For example, map scale and known landmarks are helpful for navigation but do not specifically focus on the range measurement aspect. Similarly, while compass readings and GPS locations can assist in determining overall position, they may not directly indicate the distance to a target. Lastly, estimation and visual observation are more subjective and less precise, which can lead to inaccuracies in range determination. Thus, the three methods specified