What is the primary purpose of using RNAV systems during navigation?

The primary purpose of using RNAV (Area Navigation) systems during navigation is to enhance navigation precision. RNAV allows aircraft to navigate along predetermined flight paths without the need for ground-based navigational aids. This capability enables pilots to achieve more accurate positioning, which is particularly valuable in areas with complex airspace or when flying under instrument flight rules (IFR). By using RNAV, aircraft can follow more direct routes to their destinations, improve safety by reducing the chance of navigational errors, and optimize air traffic management.

While shortening flight times can be an indirect benefit of the increased precision RNAV provides, the essential purpose revolves around the ability to navigate accurately and efficiently in various airspace conditions. Thus, enhancing navigation precision is the foundational reason for the implementation of RNAV systems.