Which document provides obstacle data along airways?

Which document provides obstacle data along airways?

• A. ENR 5.4
• B. AIP En Route
• C. ICAO Annex 11
• D. NOTAMs

Answer: (A)

Obstacle data along airways is a permanent publication in the AIP En Route, specifically in the section titled ENR 5.4, which is the part named “Obstacle data along air routes.” This section lists known obstacles on ATS routes with their precise locations and elevations, providing essential information for flight planning and maintaining obstacle clearance along airways. It’s the authoritative source pilots and planners consult for fixed, long-term obstacle information. Notams, by contrast, cover temporary changes and hazards, so they don’t serve as the permanent obstacle dataset. ICAO Annex 11 sets ATS standards but isn’t a route-specific data publication. While the broader AIP En Route contains the en-route information, the exact data on obstacles along airways is found in ENR 5.4.

Obstacle data along airways is a permanent publication in the AIP En Route, specifically in the section titled ENR 5.4, which is the part named “Obstacle data along air routes.” This section lists known obstacles on ATS routes with their precise locations and elevations, providing essential information for flight planning and maintaining obstacle clearance along airways. It’s the authoritative source pilots and planners consult for fixed, long-term obstacle information.

Notams, by contrast, cover temporary changes and hazards, so they don’t serve as the permanent obstacle dataset. ICAO Annex 11 sets ATS standards but isn’t a route-specific data publication. While the broader AIP En Route contains the en-route information, the exact data on obstacles along airways is found in ENR 5.4.