Perform line-of-sight (LOS) checks on a map

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This block is not in a published chapter and should not be relied upon.

Perform LOS checks to determine visibility between observer and target.

1. Identify observer and target positions.
2. Compare elevations via contour lines or shading.
3. Assess terrain or structures blocking visibility.
4. Determine visible portion of the target area.
5. Annotate arcs, dead ground, and blocked areas on the map.