Which AIP section contains ATS routes?

Which AIP section contains ATS routes?

• A. ENR 1
• B. ENR 3
• C. ENR 5
• D. ENR 7

Answer: (B)

ATS routes are the network of predefined paths used for en-route navigation, so they belong in the En Route (ENR) part of the AIP. Within ENR, the subsection that specifically lists the actual ATS routes—the airway designators, the structure of upper and lower routes, and the routing details—is the one dedicated to ATS routes. This is the go-to section for planning en-route legs or filing flight plans, because it directly specifies which airways exist and how they are designated. Other ENR subsections cover different en-route information or administrative details, but they do not provide the catalog of airways.

ATS routes are the network of predefined paths used for en-route navigation, so they belong in the En Route (ENR) part of the AIP. Within ENR, the subsection that specifically lists the actual ATS routes—the airway designators, the structure of upper and lower routes, and the routing details—is the one dedicated to ATS routes. This is the go-to section for planning en-route legs or filing flight plans, because it directly specifies which airways exist and how they are designated. Other ENR subsections cover different en-route information or administrative details, but they do not provide the catalog of airways.