The en route facilities ring on navigation charts is depicted in which plan view?

• A. Plan view of IAP charts
• B. En route high-altitude charts
• C. En route low-altitude charts
• D. VFR sectional charts

Answer: (A)

The en route facilities ring shows the usable reception area around a navigation facility, so pilots know where the navaid will reliably work when flying approaches. This symbol is placed in the plan view of an Instrument Approach Procedure chart, which presents the map-like depiction of fixes, airways, and facilities needed for the approach. En route high- and low-altitude charts are designed to show routes and navigation aids along those routes, not the specific reception-ring around a facility. VFR sectional charts focus on visual flight information like obstacles and airspace, not instrument navigation coverage rings.