What is a primary function of visual flight rules (VFR) sectional charts?

VFR sectional charts are specifically designed to assist pilots in visual navigation and to aid in understanding the airspace structure. These charts present a wealth of information necessary for pilots flying under visual flight rules, including topographical features, airspace boundaries, navigation aids, and obstructions. The primary focus is on providing a comprehensive visual representation of the area, which helps pilots maintain situational awareness and navigate effectively while adhering to the various airspace classifications and regulations.

The other options, while they may relate to aspects of aviation, do not capture the primary function of VFR sectional charts. For instance, instruments for instrument navigation are represented in instrument approach procedures, while weather forecasts are provided by meteorological services rather than depicted on sectional charts. Similarly, while there are specific procedures for night flying, they are not the primary focus of VFR sectional charts; instead, charts are aimed at aiding navigation during the day visually.