What is RNAV and RNP? Modern Navigation, Explained
Plain-English explanation of RNAV and RNP — the satellite-based navigation that's replaced ground-based VOR routes and made flying more efficient.
FlightyFlow Team·· 6 min read
The shift from ground-based to satellite navigation
For decades, aircraft navigated by flying from one ground-based VOR beacon to the next. Routes had to follow the beacons, even if they were inefficient.
Modern aircraft navigate using RNAV (Area Navigation) — they fly along arbitrary lat/lon waypoints, mostly using GPS. RNP (Required Navigation Performance) adds a guarantee of accuracy.
What this enables
- Direct routes that save fuel and time.
- Curved approaches through mountainous terrain (think LAX, Innsbruck).
- Shorter takeoff and landing minima in poor weather.
- More efficient airspace design overall.
RNP categories
- RNP 10 — 10 nm accuracy, used for oceanic routes.
- RNP 4 — 4 nm, used for newer oceanic procedures.
- RNP 1 — 1 nm, used for terminal area navigation.
- RNP 0.3 / 0.1 (AR) — used for highly precise approaches.
What you might notice
- Smoother turns at waypoints.
- Curved approaches into airports like LAX (RNP-AR for LIDAT arrival).
- Different routes day to day depending on winds and ATC, all without changing the waypoints.
Why your tracker shows it
FlightyFlow renders the actual flown path, which often differs from the published RNAV route as ATC issues vectors.
#RNAV#RNP#navigation#aviation
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