> We use mercator for navigation and for local maps Nautical charts use Mercator projection, but aviation charts typically use the Lambert conformal conic proj

> We use mercator for navigation and for local maps Nautical charts use Mercator projection, but aviation charts typically use the Lambert conformal conic projection (LCC). https://en.wikipedia.org/wiki/Lambert_conformal_conic_projection https://en.wikipedia.org/wiki/Lambert_conformal_conic_projec... To quote the article: "Pilots use aeronautical charts based on LCC because a straight line ... approximates a great-circle route between endpoints for typical flight distances"