AA.I.E.K3FAA-S-ACS-11A · Nov 2023Knowledge
Advanced navigation equipment (e.g., FMS, Required Navigation Performance (RNP), ADS-B,...
Advanced navigation equipment (e.g., FMS, Required Navigation Performance (RNP), ADS-B, EFB, etc.) and how it is used inflight.
Bottom line
Advanced navigation concepts include area navigation, GPS/RNAV capabilities, lateral navigation (LNAV), vertical navigation (VNAV), and Required Navigation Performance (RNP). The training introduces the concepts of RNP, required authorizations (operations specifications (OpSpecs)), and training. An EFB is any device, or combination of devices, actively displaying EFB applications authorized per AC 120-76.
Key numbers
| Number | What it means |
|---|---|
| at least two approved independent navigation systems (except as provided in paragraph (c)) | Nav systems |
| more than 1 hour outside the 48 contiguous States and DC | Position fix |
| two systems (Part 25 airplanes) | Radio nav systems |
FAA references
- AC 61-138, para. 14.3.10.2 — AC No: 61-138A
- AC 91.21-1, paras. 8.3, 8.3.3 — AC No: 91.21-1D
- 14 CFR 121.389 (Flight navigator and specialized navigation equipment.) — eCFR current as of 2026-10-01
- 14 CFR 25.1307 (Miscellaneous equipment.) — eCFR current as of 2026-10-08
- AC 91-78 ch. 20 , Electronic Aeronautical Chart Display. — AC No: 91-78A
- 14 CFR 121.349 (Communication and navigation equipment for operations under VFR over routes not navigated by pilotage or for operations under IFR or over the top.) — eCFR current as of 2026-10-01
- 14 CFR 121.355 (Equipment for operations on which specialized means of navigation are used.) — eCFR current as of 2026-10-01
- AC 61-138 Appendix 2, Sample Demonstrations, and Appendix 3, Sample — AC No: 61-138A
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