This presentation will discuss the differences between control​/​performance and primary​/​supporting techniques of flying IFR, and the how, when, and why we use them. It will also break down the differences, both overt and subtle, between ground-based navaids and GPS. It concludes with a detailed description of how both techniques are used in flying an RNAV approach. Session type: Forum · Interests: Education; How To; Pilot Proficiency — Skyfarer is not affiliated with the Experimental Aircraft Association (EAA) or EAA AirVenture Oshkosh. This session is listed for informational purposes from the official AirVenture 2026 schedule. Times and locations can change during the event — verify on the official session page: https://events.rdmobile.com/Sessions/Details/3539797