Which chart would be used for plotting great-circle routes on a chart?

Which chart would be used for plotting great-circle routes on a chart?

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

Answer: (B)

Great-circle routes are the shortest paths between two points on a sphere. To visualize them on a map, you want a projection where these routes become straight lines. In the gnomonic projection, any great circle maps to a straight line on the plane, so drawing a straight line between endpoints directly corresponds to the great-circle path on Earth. That makes a gnomonic chart ideal for plotting long-distance routes. Other chart types don’t inherently convert great-circle paths into straight lines, so they don’t provide the same simplicity for plotting these routes.

Great-circle routes are the shortest paths between two points on a sphere. To visualize them on a map, you want a projection where these routes become straight lines. In the gnomonic projection, any great circle maps to a straight line on the plane, so drawing a straight line between endpoints directly corresponds to the great-circle path on Earth. That makes a gnomonic chart ideal for plotting long-distance routes. Other chart types don’t inherently convert great-circle paths into straight lines, so they don’t provide the same simplicity for plotting these routes.