This is the top-down diagram. It looks like a road map but for aircraft. You will see:
: Found at the top right (e.g., 11-1); helps pilots organize their binders or digital libraries.
Enter , a pilot for Varney Speed Lines (a predecessor to United Airlines). Jeppesen began jotting down vital information in a small black notebook: the location of a new beacon, the height of a mountain ridge, the safe altitude for a canyon, and the exact bearing needed to land at a specific airport when visibility was zero.
In the world of aviation, precision isn't just a goal—it’s a survival requirement. Among the various tools a pilot uses to navigate the skies, few are as iconic or as trusted as the . Often referred to simply as "Jepps," these charts have set the gold standard for aeronautical information for decades.
On the profile view, you will see a line with small slash marks (feathers) pointing down. That represents the glideslope antenna. If you see a next to it? That means the glideslope is unusable below a certain altitude due to interference.