Which method of locating targets involves using grid coordinates?

The grid coordinate method is designed specifically for locating targets using a set of grid coordinates, which allows for precise targeting. This method involves referencing a grid system, such as a military map that is divided into grids, where each grid square is assigned specific coordinates. By identifying the grid coordinates of a target, a squad leader can effectively communicate the target's location to other team members or supporting units. This precision makes it easier to coordinate fire support and ensures that the correct target is engaged.

In contrast, other methods like the polar plot or shift from a known point methods do not rely on grid coordinates. The polar plot method uses angles and distances from a specific point to determine target locations, while the shift from a known point method involves identifying a known point and then determining the target's location based on distance and direction from that point. Therefore, the grid coordinate method is the appropriate choice for identifying targets through grid coordinates.