Are DME distances provided solely for vertical separation applications?

DME distances, or Distance Measuring Equipment distances, are not limited to vertical separation applications; they are fundamental for a variety of navigational purposes, including horizontal navigation and situational awareness. The DME provides pilots with accurate distance information relative to the ground station, which helps them maintain optimal flight paths, comply with air traffic control instructions, and ensure safety during approaches and departures.

In addition to vertical separation, DME distances play a critical role in aiding pilots to navigate around airspace, maintain safe separation from other aircraft laterally, and on approaches to runways, particularly in conjunction with Instrument Landing Systems (ILS). Therefore, the utility of DME spans various aspects of flight operations beyond just vertical separation.