Which type of chart is essential for navigation in controlled airspace?

The sectional aeronautical chart is essential for navigation in controlled airspace because it provides detailed and relevant information specifically designed for pilots. These charts include features such as airspace classifications, navigation aids, airports, terrain elevations, and other critical navigation data. The level of detail and specific emphasis on aeronautical elements make sectional charts invaluable for ensuring safe and efficient flight operations within controlled airspace.

In contrast, topographic maps primarily focus on terrain features and elevations, which are not specifically tailored for aviation purposes. Weather radar charts provide information related to weather conditions but do not contain the navigational data required for safe travel through controlled airspace. Similarly, Global Positioning System (GPS) charts are useful for navigation but do not provide the comprehensive overview necessary for understanding airspace structures and regulations that sectional aeronautical charts do. This focus on aviation-related information makes sectional charts the most suitable choice for navigation in controlled airspace.