What is the primary function of sectional charts in aviation?

Sectional charts are specifically designed to support visual flight rules (VFR) navigation, providing pilots with crucial aeronautical information necessary for safe and effective flight in visual conditions. These charts illustrate various features, including topography, airports, airspace classifications, navigation aids, and obstacles.

The primary focus of sectional charts is to enable pilots to navigate using visual references on the ground and in the air. They are scaled appropriately to reflect details that are vital for situational awareness at lower altitudes where VFR operations typically occur. This includes important visual landmarks, which can be used by pilots to ensure they are on the correct route and to avoid restricted areas or potential hazards.

While sectional charts do include some military airspace information and can assist in planning flight routes, their fundamental purpose is to facilitate VFR navigation by providing comprehensive and user-friendly visual guidance. This makes option B the most accurate answer concerning the primary function of sectional charts in aviation.