Final answer:
A Lo-Altitude En-route Chart uses a Lambert Conformal Conic Projection designed for aeronautical navigation, with standard parallels at 9°N and 17°N to maintain accurate angles for flight routes.
Step-by-step explanation:
A Lo-Altitude En-route Chart uses a type of map projection known as the Lambert Conformal Conic Projection. This projection is constructed such that it accurately represents the shape of the Earth's features for aeronautical navigation at lower altitudes. Maps using the Lambert Conformal Conic Projection have standard parallels, which in this case are at 9°N and 17°N, where the scale of the map is exactly as stated, which is 1:12,500,000. The map will distort shapes, sizes, and distances somewhat, but maintains accurate angles around these standard parallels, which is essential for flight paths.
The use of Lambert Conformal Conic Projection on an aviation chart allows pilots to have an accurate representation of geographic information while navigating through the airspace depicted. These charts also include topographical features, similar to topographic maps but specifically adapted for aviation needs, providing crucial information for the safe operation of aircraft.