Which chart is used for air navigation?

• A. Gnomonic Chart
• B. Aeronautical Chart
• C. Chart
• D. Hypsometric Map

Answer: (B)

Air navigation relies on maps that integrate aviation-specific information in a way pilots can read quickly for planning and en route use. An aeronautical chart is designed precisely for this purpose, including airways, navigational aids, controlled airspace, airports, radio frequencies, obstacle data, and other aviation notes. This specialized chart supports both flight planning and in-flight navigation, making it the appropriate choice for air navigation.

A gnomonic chart is a projection where great-circle routes appear as straight lines, which is useful in geometric route planning but not the standard type of navigation chart pilots rely on day to day. A general “chart” is too vague and lacks the specialized aviation content. A hypsometric map shows elevation patterns and relief, not navigation information for flights.