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Navigation Databases

Why are there Special Procedures?

The FAA develops Special Procedures at airports with challenging terrain or obstacles. Typically, they have greater obstacles and lower minimum descent altitudes than standard approaches that make them worthy of special permission. The LOC DME Rwy 15 (LOC 15) arrival at KASE Aspen, CO for example, has an MDA 1,000 ft. lower than other approaches.  Universal Avionics often receives questions about the LOC 15 arrival into Aspen, CO. Its name is similar to a Localizer Circle to Land approach (LOC DME-E) into the same airport – an approach type not supported by the Flight Management System (FMS), and not in the Navigation Database.