For VHF airways featuring a VOR on one end and an NDB on the other, what is the opening angle on each side of the centerline?

For VHF airways that include a VOR at one end and an NDB (Non-Directional Beacon) at the other, the opening angle on each side of the centerline is designated as 5 degrees. This 5-degree angle is essential for ensuring that aircraft remain within the protected airspace on either side of the airway, which facilitates safe navigation and minimizes potential interference from surrounding air traffic.

The configuration of VHF airways is aimed at enhancing the accuracy and reliability of navigation for pilots using these routes. By maintaining this specific angle, it provides a buffer zone that accounts for navigational uncertainties while allowing for lateral deviation from the centerline without compromising safety. Adhering to this standardized angle ensures compliance with air traffic regulations and maintains navigational integrity on these routes.