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AI.V.B.K3FAA-S-ACS-25 · Nov 2023Knowledge

Requirements for current and appropriate navigation data.

ACS element text (the applicant demonstrates understanding of)

Requirements for current and appropriate navigation data.

Bottom line

The FMS navigation database must be current if the system is used for IFR navigation and approaches. To use some GPS-based RNAV units certified under TSO 129 for IFR flight, the aircraft must also carry an approved and alternate means of IFR navigation appropriate to the flight, such as a VOR receiver.

Key numbers

Key numbers for Requirements for current and appropriate navigation data.
NumberWhat it means
TSO 129 GPS units require an alternate means of IFR navigationTSO 129

FAA references

  1. AVIONICS ch. 3 (p. 3-6) — FAA-H-8083-6
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