What is the definition of resection?

The correct choice identifies resection as a technique used in land navigation. Resection involves determining your own location on a map by utilizing compass bearings (grid azimuths) to known locations or landmarks. This skill is crucial for effective navigation, particularly in unfamiliar terrains. By taking bearings and drawing lines on the map toward the known points, you can pinpoint your current position, enhancing your situational awareness and overall navigation precision.

The other options do relate to navigation and map skills, but they do not define resection accurately. The use of maps for navigation alone does not encompass the critical aspect of determining one's position relative to known points. Locating one's position using grid azimuth to known locations is part of the resection process but is not as comprehensive as the correct answer. Marking unknown points on a map and determining distances are important navigation practices, but again, they do not capture the essence of resection. Thus, the selected answer aptly conveys the full concept of resection in the context of navigation.